Search for an LSP gluino at LEP with the DELPHI detector

J Abdallah; P Abreu; W Adam; P Adzic; T Albrecht; T Alderweireld; R Alemany-Fernandez; T Allmendinger; PP Allport; U Amaldi; N Amapane; S Amato; E Anashkin; A Andreazza; S Andringa; N Anjos; P Antilogus; WD Apel; Y Arnoud; Stefan Ask; B Asman; JE Augustin; A Augustinus; P Baillon; A Ballestrero; P Bambade; R Barbier; D Bardin; G Barker; A Baroncelli; M Battaglia; M Baubillier; KH Becks; M Begalli; A Behrmann; E Ben-Haim; N Benekos; A Benvenuti; C Berat; M Berggren; L Berntzon; D Bertrand; M Besancon; N Besson; D Bloch; M Blom; M Bluj; M Bonesini; M Boonekamp; PSL Booth; G Borisov; O Botner; B Bouquet; TJV Bowcock; I Boykc; M Bracko; R Brenner; E Brodet; P Bruckman; JM Brunet; L Bugge; P Buschmann; M Calvi; T Camporesi; V Canale; F Carena; N Castro; F Cavallo; M Chapkin; P Charpentier; P Checchia; R Chierici; P Chliapnikov; J Chudoba; SU Chung; K Cieslik; P Collins; R Contri; G Cosme; F Cossutti; MJ Costa; B Crawley; D Crennell; J Cuevas; J D'Hondt; J Dalmau; T da Silva; W Da Silva; G Della Ricca; A De Angelis; W De Boer; C De Clercq; B De Lotto; N De Maria; A De Mir; L de Paula; L Di Ciaccio; A Di Simone; K Doroba; J Drees; M Dris; G Eigen; T Ekelof; M Ellert; M Elsing; MCE Santo; G Fanourakis; D Fassouliotis; M Feindt; J Fernandez; A Ferrer; F Ferro; U Flagmeyer; H Foeth; E Fokitis; F Fulda-Quenzer; J Fuster; M Gandelman; C Garcia; P Gavillet; E Gazis; T Geralis; R Gokieli; B Golob; G Gomez-Ceballos; P Goncalves; E Graziani; G Grosdidier; K Grzelak; J Guy; C Haag; A Hallgren; K Hamacher; K Hamilton; J Hansen; S Haug; F Hauler; Vincent Hedberg; M Hennecke; H Herr; J Hoffman; SO Hohngren; PJ Holt; MA Houlden; K Hultqvist; JN Jackson; G Jarlskog; P Jarry; D Jeans; EK Johansson; PD Johansson; P Jonsson; C Joram; L Jungermann; F Kapusta; S Katsanevas; E Katsoufis; G Kernel; BP Kersevan; A Kiiskinen; BT King; NJ Kjaer; P Kluit; P Kokkinias; C Kourkoumelis; O Kouznetsov; Z Krumstein; M Kucharczyk; J Lamsa; G Leder; F Ledroit; L Leinonen; R Leitner; J Lemonne; V Lepeltier; T Lesiak; W Liebig; D Liko; A Lipniacka; JH Lopes; JM Lope; D Loukas; P Lutz; L Lyons; J MacNaughton; A Malek; S Maltezos; F Mandl; J Marco; R Marco; B Marechal; M Margoni; JC Marin; C Mariotti; A Markou; C Martinez-Rivero; J Masik; N Mastroyiannopoulos; F Matorras; C Matteuzzi; F Mazzucato; M Mazzucato; R Mc Nulty; C Meroni; WT Meyer; E Mighore; W Mitaroff; Ulf Mjörnmark; T Moa; M Moch; K Moenig; R Monge; J Montenegro; D Moraes; S Moreno; P Morettini; U Mueller; K Muenich; M Mulders; L Mundim; W Murray; B Muryn; G Myatt; T Myklebust; M Nassiakou; F Navarria; K Nawrocki; R Nicolaidou; M Nikolenko; A Oblakowska-Mucha; V Obraztsov; A Olshevski; A Onofre; R Orava; K Osterberg; A Ouraou; A Oyanguren; M Paganoni; S Paiano; JP Palacios; H Palka; TD Papadopoulou; L Pape; C Parkes; F Parodi; U Parzefall; A Passeri; O Passon; L Peralta; V Perepelitsa; A Perrotta; A Petrolini; J Piedra; L Pieri; F Pierre; M Pimenta; E Piotto; T Podobnik; V Poireau; ME Pol; G Polok; P Poropat; V Pozdniakov; N Pukhaeva; A Pullia; J Rames; L Ramler; A Read; P Rebecchi; J Rehn; D Reid; R Reinhardt; P Renton; F Richard; J Ridky; M Rivero; D Rodriguez; A Romero; P Ronchese; E Rosenberg; P Roudeau; T Rovelli; V Ruhlmann-Kleider; D Ryabtchikov; A Sadovsky; L Salmi; J Salt; A Savoy-Navarro; U Schwickerath; A Segar; R Sekulin; M Siebel; A Sisakian; G Smadja; Oxana Smirnova; A Sokolov; A Sopczak; R Sosnowski; T Spassov; M Stanitzki; A Stocchi; J Strauss; B Stugu; M Szczekowski; M Szeptycka; T Szumlak; T Tabarelli; AC Taffard; F Tegenfeldt; J Timmermans; L Tkatchev; M Tobin; S Todorovova; A Tomaradze; B Tome; A Tonazzo; P Tortosa; P Travnicek; D Treille; G Tristram; M Trochimczuk; C Troncon; ML Turluer; IA Tyapkin; P Tyapkin; S Tzamarias; V Uvarov; G Valenti; P Van Dam; J Van Eldik; A Van Lysebetten; N van Remortel; I Van Vulpen; G Vegni; F Veloso; W Venus; F Verbeure; P Verdier; V Verzi; D Vilanova; L Vitale; V Vrba; H Wahlen; AJ Washbrook; C Weiser; D Wicke; J Wicken; G Wilkinson; M Winter; M Witek; O Yushchenko; A Zalewska; P Zalewski; D Zavrtanik; NI Zimin; A Zintchenko; M Zupan

doi:10.1140/epjc/s2002-01111-5

Search for an LSP gluino at LEP with the DELPHI detector

J Abdallah, P Abreu, W Adam, P Adzic, T Albrecht, T Alderweireld, R Alemany-Fernandez, T Allmendinger, PP Allport, U Amaldi, N Amapane, S Amato, E Anashkin, A Andreazza, S Andringa, N Anjos, P Antilogus, WD Apel, Y Arnoud, Stefan AskB Asman, JE Augustin, A Augustinus, P Baillon, A Ballestrero, P Bambade, R Barbier, D Bardin, G Barker, A Baroncelli, M Battaglia, M Baubillier, KH Becks, M Begalli, A Behrmann, E Ben-Haim, N Benekos, A Benvenuti, C Berat, M Berggren, L Berntzon, D Bertrand, M Besancon, N Besson, D Bloch, M Blom, M Bluj, M Bonesini, M Boonekamp, PSL Booth, G Borisov, O Botner, B Bouquet, TJV Bowcock, I Boykc, M Bracko, R Brenner, E Brodet, P Bruckman, JM Brunet, L Bugge, P Buschmann, M Calvi, T Camporesi, V Canale, F Carena, N Castro, F Cavallo, M Chapkin, P Charpentier, P Checchia, R Chierici, P Chliapnikov, J Chudoba, SU Chung, K Cieslik, P Collins, R Contri, G Cosme, F Cossutti, MJ Costa, B Crawley, D Crennell, J Cuevas, J D'Hondt, J Dalmau, T da Silva, W Da Silva, G Della Ricca, A De Angelis, W De Boer, C De Clercq, B De Lotto, N De Maria, A De Mir, L de Paula, L Di Ciaccio, A Di Simone, K Doroba, J Drees, M Dris, G Eigen, T Ekelof, M Ellert, M Elsing, MCE Santo, G Fanourakis, D Fassouliotis, M Feindt, J Fernandez, A Ferrer, F Ferro, U Flagmeyer, H Foeth, E Fokitis, F Fulda-Quenzer, J Fuster, M Gandelman, C Garcia, P Gavillet, E Gazis, T Geralis, R Gokieli, B Golob, G Gomez-Ceballos, P Goncalves, E Graziani, G Grosdidier, K Grzelak, J Guy, C Haag, A Hallgren, K Hamacher, K Hamilton, J Hansen, S Haug, F Hauler, Vincent Hedberg, M Hennecke, H Herr, J Hoffman, SO Hohngren, PJ Holt, MA Houlden, K Hultqvist, JN Jackson, G Jarlskog, P Jarry, D Jeans, EK Johansson, PD Johansson, P Jonsson, C Joram, L Jungermann, F Kapusta, S Katsanevas, E Katsoufis, G Kernel, BP Kersevan, A Kiiskinen, BT King, NJ Kjaer, P Kluit, P Kokkinias, C Kourkoumelis, O Kouznetsov, Z Krumstein, M Kucharczyk, J Lamsa, G Leder, F Ledroit, L Leinonen, R Leitner, J Lemonne, V Lepeltier, T Lesiak, W Liebig, D Liko, A Lipniacka, JH Lopes, JM Lope, D Loukas, P Lutz, L Lyons, J MacNaughton, A Malek, S Maltezos, F Mandl, J Marco, R Marco, B Marechal, M Margoni, JC Marin, C Mariotti, A Markou, C Martinez-Rivero, J Masik, N Mastroyiannopoulos, F Matorras, C Matteuzzi, F Mazzucato, M Mazzucato, R Mc Nulty, C Meroni, WT Meyer, E Mighore, W Mitaroff, Ulf Mjörnmark, T Moa, M Moch, K Moenig, R Monge, J Montenegro, D Moraes, S Moreno, P Morettini, U Mueller, K Muenich, M Mulders, L Mundim, W Murray, B Muryn, G Myatt, T Myklebust, M Nassiakou, F Navarria, K Nawrocki, R Nicolaidou, M Nikolenko, A Oblakowska-Mucha, V Obraztsov, A Olshevski, A Onofre, R Orava, K Osterberg, A Ouraou, A Oyanguren, M Paganoni, S Paiano, JP Palacios, H Palka, TD Papadopoulou, L Pape, C Parkes, F Parodi, U Parzefall, A Passeri, O Passon, L Peralta, V Perepelitsa, A Perrotta, A Petrolini, J Piedra, L Pieri, F Pierre, M Pimenta, E Piotto, T Podobnik, V Poireau, ME Pol, G Polok, P Poropat, V Pozdniakov, N Pukhaeva, A Pullia, J Rames, L Ramler, A Read, P Rebecchi, J Rehn, D Reid, R Reinhardt, P Renton, F Richard, J Ridky, M Rivero, D Rodriguez, A Romero, P Ronchese, E Rosenberg, P Roudeau, T Rovelli, V Ruhlmann-Kleider, D Ryabtchikov, A Sadovsky, L Salmi, J Salt, A Savoy-Navarro, U Schwickerath, A Segar, R Sekulin, M Siebel, A Sisakian, G Smadja, Oxana Smirnova, A Sokolov, A Sopczak, R Sosnowski, T Spassov, M Stanitzki, A Stocchi, J Strauss, B Stugu, M Szczekowski, M Szeptycka, T Szumlak, T Tabarelli, AC Taffard, F Tegenfeldt, J Timmermans, L Tkatchev, M Tobin, S Todorovova, A Tomaradze, B Tome, A Tonazzo, P Tortosa, P Travnicek, D Treille, G Tristram, M Trochimczuk, C Troncon, ML Turluer, IA Tyapkin, P Tyapkin, S Tzamarias, V Uvarov, G Valenti, P Van Dam, J Van Eldik, A Van Lysebetten, N van Remortel, I Van Vulpen, G Vegni, F Veloso, W Venus, F Verbeure, P Verdier, V Verzi, D Vilanova, L Vitale, V Vrba, H Wahlen, AJ Washbrook, C Weiser, D Wicke, J Wicken, G Wilkinson, M Winter, M Witek, O Yushchenko, A Zalewska, P Zalewski, D Zavrtanik, NI Zimin, A Zintchenko, M Zupan

Particle and nuclear physics

Research output: Contribution to journal › Article › peer-review

Abstract

In some supersymmetric models, the gluino ((g) over tilde) is predicted to be light and stable. In that case, it would hadronize to form R-hadrons. In these models, the missing energy signature of the lightest supersymmetric particle is no longer valid, even if R-parity is conserved. Therefore, such a gluino is not constrained by hadron collider results, which looked for the decay (g) over tilde --> q (q) over bar(χ) over tilde (0)(1). Data collected by the DELPHI detector in 1994 at 91.2 GeV have been analysed to search for q (q) over bar(gg) over tilde events. No deviation from Standard Model predictions is observed and a gluino mass between 2 and 18 GeV/c(2) is excluded at the 95% confidence level in these models. Then, R-hadrons produced in the squark decays were searched for in the data collected by DELPHI at the centre-of-mass energies of 189 to 208 GeV, corresponding to an overall integrated luminosity of 609 pb(-1). The observed number of events is in agreement with the Standard Model predictions. Limits at 95% confidence level are derived on the squark masses from the excluded regions in the plane (m((q) over tilde1),m((g) over bar)): m((t) over tilde1) > 90 GeV/c(2) and m((b) over tilde1) > 96 GeV/c(2) for purely left squarks. m((t) over tilde1) > 87 GeV/c(2) and m((b) over tilde1) > 82 GeV/c(2) independent of the mixing angle.

Original language	English
Pages (from-to)	505-525
Journal	European Physical Journal C. Particles and Fields
Volume	26
Issue number	4
DOIs	https://doi.org/10.1140/epjc/s2002-01111-5
Publication status	Published - 2003

Subject classification (UKÄ)

Subatomic Physics

Access to Document

10.1140/epjc/s2002-01111-5

Cite this

Abdallah, J., Abreu, P., Adam, W., Adzic, P., Albrecht, T., Alderweireld, T., Alemany-Fernandez, R., Allmendinger, T., Allport, PP., Amaldi, U., Amapane, N., Amato, S., Anashkin, E., Andreazza, A., Andringa, S., Anjos, N., Antilogus, P., Apel, WD., Arnoud, Y., ... Zupan, M. (2003). Search for an LSP gluino at LEP with the DELPHI detector. European Physical Journal C. Particles and Fields, 26(4), 505-525. https://doi.org/10.1140/epjc/s2002-01111-5

@article{f20462efd1f0437f98c4391647459527,

title = "Search for an LSP gluino at LEP with the DELPHI detector",

abstract = "In some supersymmetric models, the gluino ((g) over tilde) is predicted to be light and stable. In that case, it would hadronize to form R-hadrons. In these models, the missing energy signature of the lightest supersymmetric particle is no longer valid, even if R-parity is conserved. Therefore, such a gluino is not constrained by hadron collider results, which looked for the decay (g) over tilde --> q (q) over bar(χ) over tilde (0)(1). Data collected by the DELPHI detector in 1994 at 91.2 GeV have been analysed to search for q (q) over bar(gg) over tilde events. No deviation from Standard Model predictions is observed and a gluino mass between 2 and 18 GeV/c(2) is excluded at the 95% confidence level in these models. Then, R-hadrons produced in the squark decays were searched for in the data collected by DELPHI at the centre-of-mass energies of 189 to 208 GeV, corresponding to an overall integrated luminosity of 609 pb(-1). The observed number of events is in agreement with the Standard Model predictions. Limits at 95% confidence level are derived on the squark masses from the excluded regions in the plane (m((q) over tilde1),m((g) over bar)): m((t) over tilde1) > 90 GeV/c(2) and m((b) over tilde1) > 96 GeV/c(2) for purely left squarks. m((t) over tilde1) > 87 GeV/c(2) and m((b) over tilde1) > 82 GeV/c(2) independent of the mixing angle.",

author = "J Abdallah and P Abreu and W Adam and P Adzic and T Albrecht and T Alderweireld and R Alemany-Fernandez and T Allmendinger and PP Allport and U Amaldi and N Amapane and S Amato and E Anashkin and A Andreazza and S Andringa and N Anjos and P Antilogus and WD Apel and Y Arnoud and Stefan Ask and B Asman and JE Augustin and A Augustinus and P Baillon and A Ballestrero and P Bambade and R Barbier and D Bardin and G Barker and A Baroncelli and M Battaglia and M Baubillier and KH Becks and M Begalli and A Behrmann and E Ben-Haim and N Benekos and A Benvenuti and C Berat and M Berggren and L Berntzon and D Bertrand and M Besancon and N Besson and D Bloch and M Blom and M Bluj and M Bonesini and M Boonekamp and PSL Booth and G Borisov and O Botner and B Bouquet and TJV Bowcock and I Boykc and M Bracko and R Brenner and E Brodet and P Bruckman and JM Brunet and L Bugge and P Buschmann and M Calvi and T Camporesi and V Canale and F Carena and N Castro and F Cavallo and M Chapkin and P Charpentier and P Checchia and R Chierici and P Chliapnikov and J Chudoba and SU Chung and K Cieslik and P Collins and R Contri and G Cosme and F Cossutti and MJ Costa and B Crawley and D Crennell and J Cuevas and J D'Hondt and J Dalmau and {da Silva}, T and {Da Silva}, W and {Della Ricca}, G and {De Angelis}, A and {De Boer}, W and {De Clercq}, C and {De Lotto}, B and {De Maria}, N and {De Mir}, A and {de Paula}, L and {Di Ciaccio}, L and {Di Simone}, A and K Doroba and J Drees and M Dris and G Eigen and T Ekelof and M Ellert and M Elsing and MCE Santo and G Fanourakis and D Fassouliotis and M Feindt and J Fernandez and A Ferrer and F Ferro and U Flagmeyer and H Foeth and E Fokitis and F Fulda-Quenzer and J Fuster and M Gandelman and C Garcia and P Gavillet and E Gazis and T Geralis and R Gokieli and B Golob and G Gomez-Ceballos and P Goncalves and E Graziani and G Grosdidier and K Grzelak and J Guy and C Haag and A Hallgren and K Hamacher and K Hamilton and J Hansen and S Haug and F Hauler and Vincent Hedberg and M Hennecke and H Herr and J Hoffman and SO Hohngren and PJ Holt and MA Houlden and K Hultqvist and JN Jackson and G Jarlskog and P Jarry and D Jeans and EK Johansson and PD Johansson and P Jonsson and C Joram and L Jungermann and F Kapusta and S Katsanevas and E Katsoufis and G Kernel and BP Kersevan and A Kiiskinen and BT King and NJ Kjaer and P Kluit and P Kokkinias and C Kourkoumelis and O Kouznetsov and Z Krumstein and M Kucharczyk and J Lamsa and G Leder and F Ledroit and L Leinonen and R Leitner and J Lemonne and V Lepeltier and T Lesiak and W Liebig and D Liko and A Lipniacka and JH Lopes and JM Lope and D Loukas and P Lutz and L Lyons and J MacNaughton and A Malek and S Maltezos and F Mandl and J Marco and R Marco and B Marechal and M Margoni and JC Marin and C Mariotti and A Markou and C Martinez-Rivero and J Masik and N Mastroyiannopoulos and F Matorras and C Matteuzzi and F Mazzucato and M Mazzucato and {Mc Nulty}, R and C Meroni and WT Meyer and E Mighore and W Mitaroff and Ulf Mj{\"o}rnmark and T Moa and M Moch and K Moenig and R Monge and J Montenegro and D Moraes and S Moreno and P Morettini and U Mueller and K Muenich and M Mulders and L Mundim and W Murray and B Muryn and G Myatt and T Myklebust and M Nassiakou and F Navarria and K Nawrocki and R Nicolaidou and M Nikolenko and A Oblakowska-Mucha and V Obraztsov and A Olshevski and A Onofre and R Orava and K Osterberg and A Ouraou and A Oyanguren and M Paganoni and S Paiano and JP Palacios and H Palka and TD Papadopoulou and L Pape and C Parkes and F Parodi and U Parzefall and A Passeri and O Passon and L Peralta and V Perepelitsa and A Perrotta and A Petrolini and J Piedra and L Pieri and F Pierre and M Pimenta and E Piotto and T Podobnik and V Poireau and ME Pol and G Polok and P Poropat and V Pozdniakov and N Pukhaeva and A Pullia and J Rames and L Ramler and A Read and P Rebecchi and J Rehn and D Reid and R Reinhardt and P Renton and F Richard and J Ridky and M Rivero and D Rodriguez and A Romero and P Ronchese and E Rosenberg and P Roudeau and T Rovelli and V Ruhlmann-Kleider and D Ryabtchikov and A Sadovsky and L Salmi and J Salt and A Savoy-Navarro and U Schwickerath and A Segar and R Sekulin and M Siebel and A Sisakian and G Smadja and Oxana Smirnova and A Sokolov and A Sopczak and R Sosnowski and T Spassov and M Stanitzki and A Stocchi and J Strauss and B Stugu and M Szczekowski and M Szeptycka and T Szumlak and T Tabarelli and AC Taffard and F Tegenfeldt and J Timmermans and L Tkatchev and M Tobin and S Todorovova and A Tomaradze and B Tome and A Tonazzo and P Tortosa and P Travnicek and D Treille and G Tristram and M Trochimczuk and C Troncon and ML Turluer and IA Tyapkin and P Tyapkin and S Tzamarias and V Uvarov and G Valenti and {Van Dam}, P and {Van Eldik}, J and {Van Lysebetten}, A and {van Remortel}, N and {Van Vulpen}, I and G Vegni and F Veloso and W Venus and F Verbeure and P Verdier and V Verzi and D Vilanova and L Vitale and V Vrba and H Wahlen and AJ Washbrook and C Weiser and D Wicke and J Wicken and G Wilkinson and M Winter and M Witek and O Yushchenko and A Zalewska and P Zalewski and D Zavrtanik and NI Zimin and A Zintchenko and M Zupan",

year = "2003",

doi = "10.1140/epjc/s2002-01111-5",

language = "English",

volume = "26",

pages = "505--525",

journal = "European Physical Journal C. Particles and Fields",

issn = "1434-6044",

publisher = "Springer Nature",

number = "4",

}

Abdallah, J, Abreu, P, Adam, W, Adzic, P, Albrecht, T, Alderweireld, T, Alemany-Fernandez, R, Allmendinger, T, Allport, PP, Amaldi, U, Amapane, N, Amato, S, Anashkin, E, Andreazza, A, Andringa, S, Anjos, N, Antilogus, P, Apel, WD, Arnoud, Y, Ask, S, Asman, B, Augustin, JE, Augustinus, A, Baillon, P, Ballestrero, A, Bambade, P, Barbier, R, Bardin, D, Barker, G, Baroncelli, A, Battaglia, M, Baubillier, M, Becks, KH, Begalli, M, Behrmann, A, Ben-Haim, E, Benekos, N, Benvenuti, A, Berat, C, Berggren, M, Berntzon, L, Bertrand, D, Besancon, M, Besson, N, Bloch, D, Blom, M, Bluj, M, Bonesini, M, Boonekamp, M, Booth, PSL, Borisov, G, Botner, O, Bouquet, B, Bowcock, TJV, Boykc, I, Bracko, M, Brenner, R, Brodet, E, Bruckman, P, Brunet, JM, Bugge, L, Buschmann, P, Calvi, M, Camporesi, T, Canale, V, Carena, F, Castro, N, Cavallo, F, Chapkin, M, Charpentier, P, Checchia, P, Chierici, R, Chliapnikov, P, Chudoba, J, Chung, SU, Cieslik, K, Collins, P, Contri, R, Cosme, G, Cossutti, F, Costa, MJ, Crawley, B, Crennell, D, Cuevas, J, D'Hondt, J, Dalmau, J, da Silva, T, Da Silva, W, Della Ricca, G, De Angelis, A, De Boer, W, De Clercq, C, De Lotto, B, De Maria, N, De Mir, A, de Paula, L, Di Ciaccio, L, Di Simone, A, Doroba, K, Drees, J, Dris, M, Eigen, G, Ekelof, T, Ellert, M, Elsing, M, Santo, MCE, Fanourakis, G, Fassouliotis, D, Feindt, M, Fernandez, J, Ferrer, A, Ferro, F, Flagmeyer, U, Foeth, H, Fokitis, E, Fulda-Quenzer, F, Fuster, J, Gandelman, M, Garcia, C, Gavillet, P, Gazis, E, Geralis, T, Gokieli, R, Golob, B, Gomez-Ceballos, G, Goncalves, P, Graziani, E, Grosdidier, G, Grzelak, K, Guy, J, Haag, C, Hallgren, A, Hamacher, K, Hamilton, K, Hansen, J, Haug, S, Hauler, F, Hedberg, V, Hennecke, M, Herr, H, Hoffman, J, Hohngren, SO, Holt, PJ, Houlden, MA, Hultqvist, K, Jackson, JN, Jarlskog, G, Jarry, P, Jeans, D, Johansson, EK, Johansson, PD, Jonsson, P, Joram, C, Jungermann, L, Kapusta, F, Katsanevas, S, Katsoufis, E, Kernel, G, Kersevan, BP, Kiiskinen, A, King, BT, Kjaer, NJ, Kluit, P, Kokkinias, P, Kourkoumelis, C, Kouznetsov, O, Krumstein, Z, Kucharczyk, M, Lamsa, J, Leder, G, Ledroit, F, Leinonen, L, Leitner, R, Lemonne, J, Lepeltier, V, Lesiak, T, Liebig, W, Liko, D, Lipniacka, A, Lopes, JH, Lope, JM, Loukas, D, Lutz, P, Lyons, L, MacNaughton, J, Malek, A, Maltezos, S, Mandl, F, Marco, J, Marco, R, Marechal, B, Margoni, M, Marin, JC, Mariotti, C, Markou, A, Martinez-Rivero, C, Masik, J, Mastroyiannopoulos, N, Matorras, F, Matteuzzi, C, Mazzucato, F, Mazzucato, M, Mc Nulty, R, Meroni, C, Meyer, WT, Mighore, E, Mitaroff, W, Mjörnmark, U, Moa, T, Moch, M, Moenig, K, Monge, R, Montenegro, J, Moraes, D, Moreno, S, Morettini, P, Mueller, U, Muenich, K, Mulders, M, Mundim, L, Murray, W, Muryn, B, Myatt, G, Myklebust, T, Nassiakou, M, Navarria, F, Nawrocki, K, Nicolaidou, R, Nikolenko, M, Oblakowska-Mucha, A, Obraztsov, V, Olshevski, A, Onofre, A, Orava, R, Osterberg, K, Ouraou, A, Oyanguren, A, Paganoni, M, Paiano, S, Palacios, JP, Palka, H, Papadopoulou, TD, Pape, L, Parkes, C, Parodi, F, Parzefall, U, Passeri, A, Passon, O, Peralta, L, Perepelitsa, V, Perrotta, A, Petrolini, A, Piedra, J, Pieri, L, Pierre, F, Pimenta, M, Piotto, E, Podobnik, T, Poireau, V, Pol, ME, Polok, G, Poropat, P, Pozdniakov, V, Pukhaeva, N, Pullia, A, Rames, J, Ramler, L, Read, A, Rebecchi, P, Rehn, J, Reid, D, Reinhardt, R, Renton, P, Richard, F, Ridky, J, Rivero, M, Rodriguez, D, Romero, A, Ronchese, P, Rosenberg, E, Roudeau, P, Rovelli, T, Ruhlmann-Kleider, V, Ryabtchikov, D, Sadovsky, A, Salmi, L, Salt, J, Savoy-Navarro, A, Schwickerath, U, Segar, A, Sekulin, R, Siebel, M, Sisakian, A, Smadja, G, Smirnova, O, Sokolov, A, Sopczak, A, Sosnowski, R, Spassov, T, Stanitzki, M, Stocchi, A, Strauss, J, Stugu, B, Szczekowski, M, Szeptycka, M, Szumlak, T, Tabarelli, T, Taffard, AC, Tegenfeldt, F, Timmermans, J, Tkatchev, L, Tobin, M, Todorovova, S, Tomaradze, A, Tome, B, Tonazzo, A, Tortosa, P, Travnicek, P, Treille, D, Tristram, G, Trochimczuk, M, Troncon, C, Turluer, ML, Tyapkin, IA, Tyapkin, P, Tzamarias, S, Uvarov, V, Valenti, G, Van Dam, P, Van Eldik, J, Van Lysebetten, A, van Remortel, N, Van Vulpen, I, Vegni, G, Veloso, F, Venus, W, Verbeure, F, Verdier, P, Verzi, V, Vilanova, D, Vitale, L, Vrba, V, Wahlen, H, Washbrook, AJ, Weiser, C, Wicke, D, Wicken, J, Wilkinson, G, Winter, M, Witek, M, Yushchenko, O, Zalewska, A, Zalewski, P, Zavrtanik, D, Zimin, NI, Zintchenko, A & Zupan, M 2003, 'Search for an LSP gluino at LEP with the DELPHI detector', European Physical Journal C. Particles and Fields, vol. 26, no. 4, pp. 505-525. https://doi.org/10.1140/epjc/s2002-01111-5

TY - JOUR

T1 - Search for an LSP gluino at LEP with the DELPHI detector

AU - Abdallah, J

AU - Abreu, P

AU - Adam, W

AU - Adzic, P

AU - Albrecht, T

AU - Alderweireld, T

AU - Alemany-Fernandez, R

AU - Allmendinger, T

AU - Allport, PP

AU - Amaldi, U

AU - Amapane, N

AU - Amato, S

AU - Anashkin, E

AU - Andreazza, A

AU - Andringa, S

AU - Anjos, N

AU - Antilogus, P

AU - Apel, WD

AU - Arnoud, Y

AU - Ask, Stefan

AU - Asman, B

AU - Augustin, JE

AU - Augustinus, A

AU - Baillon, P

AU - Ballestrero, A

AU - Bambade, P

AU - Barbier, R

AU - Bardin, D

AU - Barker, G

AU - Baroncelli, A

AU - Battaglia, M

AU - Baubillier, M

AU - Becks, KH

AU - Begalli, M

AU - Behrmann, A

AU - Ben-Haim, E

AU - Benekos, N

AU - Benvenuti, A

AU - Berat, C

AU - Berggren, M

AU - Berntzon, L

AU - Bertrand, D

AU - Besancon, M

AU - Besson, N

AU - Bloch, D

AU - Blom, M

AU - Bluj, M

AU - Bonesini, M

AU - Boonekamp, M

AU - Booth, PSL

AU - Borisov, G

AU - Botner, O

AU - Bouquet, B

AU - Bowcock, TJV

AU - Boykc, I

AU - Bracko, M

AU - Brenner, R

AU - Brodet, E

AU - Bruckman, P

AU - Brunet, JM

AU - Bugge, L

AU - Buschmann, P

AU - Calvi, M

AU - Camporesi, T

AU - Canale, V

AU - Carena, F

AU - Castro, N

AU - Cavallo, F

AU - Chapkin, M

AU - Charpentier, P

AU - Checchia, P

AU - Chierici, R

AU - Chliapnikov, P

AU - Chudoba, J

AU - Chung, SU

AU - Cieslik, K

AU - Collins, P

AU - Contri, R

AU - Cosme, G

AU - Cossutti, F

AU - Costa, MJ

AU - Crawley, B

AU - Crennell, D

AU - Cuevas, J

AU - D'Hondt, J

AU - Dalmau, J

AU - da Silva, T

AU - Da Silva, W

AU - Della Ricca, G

AU - De Angelis, A

AU - De Boer, W

AU - De Clercq, C

AU - De Lotto, B

AU - De Maria, N

AU - De Mir, A

AU - de Paula, L

AU - Di Ciaccio, L

AU - Di Simone, A

AU - Doroba, K

AU - Drees, J

AU - Dris, M

AU - Eigen, G

AU - Ekelof, T

AU - Ellert, M

AU - Elsing, M

AU - Santo, MCE

AU - Fanourakis, G

AU - Fassouliotis, D

AU - Feindt, M

AU - Fernandez, J

AU - Ferrer, A

AU - Ferro, F

AU - Flagmeyer, U

AU - Foeth, H

AU - Fokitis, E

AU - Fulda-Quenzer, F

AU - Fuster, J

AU - Gandelman, M

AU - Garcia, C

AU - Gavillet, P

AU - Gazis, E

AU - Geralis, T

AU - Gokieli, R

AU - Golob, B

AU - Gomez-Ceballos, G

AU - Goncalves, P

AU - Graziani, E

AU - Grosdidier, G

AU - Grzelak, K

AU - Guy, J

AU - Haag, C

AU - Hallgren, A

AU - Hamacher, K

AU - Hamilton, K

AU - Hansen, J

AU - Haug, S

AU - Hauler, F

AU - Hedberg, Vincent

AU - Hennecke, M

AU - Herr, H

AU - Hoffman, J

AU - Hohngren, SO

AU - Holt, PJ

AU - Houlden, MA

AU - Hultqvist, K

AU - Jackson, JN

AU - Jarlskog, G

AU - Jarry, P

AU - Jeans, D

AU - Johansson, EK

AU - Johansson, PD

AU - Jonsson, P

AU - Joram, C

AU - Jungermann, L

AU - Kapusta, F

AU - Katsanevas, S

AU - Katsoufis, E

AU - Kernel, G

AU - Kersevan, BP

AU - Kiiskinen, A

AU - King, BT

AU - Kjaer, NJ

AU - Kluit, P

AU - Kokkinias, P

AU - Kourkoumelis, C

AU - Kouznetsov, O

AU - Krumstein, Z

AU - Kucharczyk, M

AU - Lamsa, J

AU - Leder, G

AU - Ledroit, F

AU - Leinonen, L

AU - Leitner, R

AU - Lemonne, J

AU - Lepeltier, V

AU - Lesiak, T

AU - Liebig, W

AU - Liko, D

AU - Lipniacka, A

AU - Lopes, JH

AU - Lope, JM

AU - Loukas, D

AU - Lutz, P

AU - Lyons, L

AU - MacNaughton, J

AU - Malek, A

AU - Maltezos, S

AU - Mandl, F

AU - Marco, J

AU - Marco, R

AU - Marechal, B

AU - Margoni, M

AU - Marin, JC

AU - Mariotti, C

AU - Markou, A

AU - Martinez-Rivero, C

AU - Masik, J

AU - Mastroyiannopoulos, N

AU - Matorras, F

AU - Matteuzzi, C

AU - Mazzucato, F

AU - Mazzucato, M

AU - Mc Nulty, R

AU - Meroni, C

AU - Meyer, WT

AU - Mighore, E

AU - Mitaroff, W

AU - Mjörnmark, Ulf

AU - Moa, T

AU - Moch, M

AU - Moenig, K

AU - Monge, R

AU - Montenegro, J

AU - Moraes, D

AU - Moreno, S

AU - Morettini, P

AU - Mueller, U

AU - Muenich, K

AU - Mulders, M

AU - Mundim, L

AU - Murray, W

AU - Muryn, B

AU - Myatt, G

AU - Myklebust, T

AU - Nassiakou, M

AU - Navarria, F

AU - Nawrocki, K

AU - Nicolaidou, R

AU - Nikolenko, M

AU - Oblakowska-Mucha, A

AU - Obraztsov, V

AU - Olshevski, A

AU - Onofre, A

AU - Orava, R

AU - Osterberg, K

AU - Ouraou, A

AU - Oyanguren, A

AU - Paganoni, M

AU - Paiano, S

AU - Palacios, JP

AU - Palka, H

AU - Papadopoulou, TD

AU - Pape, L

AU - Parkes, C

AU - Parodi, F

AU - Parzefall, U

AU - Passeri, A

AU - Passon, O

AU - Peralta, L

AU - Perepelitsa, V

AU - Perrotta, A

AU - Petrolini, A

AU - Piedra, J

AU - Pieri, L

AU - Pierre, F

AU - Pimenta, M

AU - Piotto, E

AU - Podobnik, T

AU - Poireau, V

AU - Pol, ME

AU - Polok, G

AU - Poropat, P

AU - Pozdniakov, V

AU - Pukhaeva, N

AU - Pullia, A

AU - Rames, J

AU - Ramler, L

AU - Read, A

AU - Rebecchi, P

AU - Rehn, J

AU - Reid, D

AU - Reinhardt, R

AU - Renton, P

AU - Richard, F

AU - Ridky, J

AU - Rivero, M

AU - Rodriguez, D

AU - Romero, A

AU - Ronchese, P

AU - Rosenberg, E

AU - Roudeau, P

AU - Rovelli, T

AU - Ruhlmann-Kleider, V

AU - Ryabtchikov, D

AU - Sadovsky, A

AU - Salmi, L

AU - Salt, J

AU - Savoy-Navarro, A

AU - Schwickerath, U

AU - Segar, A

AU - Sekulin, R

AU - Siebel, M

AU - Sisakian, A

AU - Smadja, G

AU - Smirnova, Oxana

AU - Sokolov, A

AU - Sopczak, A

AU - Sosnowski, R

AU - Spassov, T

AU - Stanitzki, M

AU - Stocchi, A

AU - Strauss, J

AU - Stugu, B

AU - Szczekowski, M

AU - Szeptycka, M

AU - Szumlak, T

AU - Tabarelli, T

AU - Taffard, AC

AU - Tegenfeldt, F

AU - Timmermans, J

AU - Tkatchev, L

AU - Tobin, M

AU - Todorovova, S

AU - Tomaradze, A

AU - Tome, B

AU - Tonazzo, A

AU - Tortosa, P

AU - Travnicek, P

AU - Treille, D

AU - Tristram, G

AU - Trochimczuk, M

AU - Troncon, C

AU - Turluer, ML

AU - Tyapkin, IA

AU - Tyapkin, P

AU - Tzamarias, S

AU - Uvarov, V

AU - Valenti, G

AU - Van Dam, P

AU - Van Eldik, J

AU - Van Lysebetten, A

AU - van Remortel, N

AU - Van Vulpen, I

AU - Vegni, G

AU - Veloso, F

AU - Venus, W

AU - Verbeure, F

AU - Verdier, P

AU - Verzi, V

AU - Vilanova, D

AU - Vitale, L

AU - Vrba, V

AU - Wahlen, H

AU - Washbrook, AJ

AU - Weiser, C

AU - Wicke, D

AU - Wicken, J

AU - Wilkinson, G

AU - Winter, M

AU - Witek, M

AU - Yushchenko, O

AU - Zalewska, A

AU - Zalewski, P

AU - Zavrtanik, D

AU - Zimin, NI

AU - Zintchenko, A

AU - Zupan, M

PY - 2003

Y1 - 2003

N2 - In some supersymmetric models, the gluino ((g) over tilde) is predicted to be light and stable. In that case, it would hadronize to form R-hadrons. In these models, the missing energy signature of the lightest supersymmetric particle is no longer valid, even if R-parity is conserved. Therefore, such a gluino is not constrained by hadron collider results, which looked for the decay (g) over tilde --> q (q) over bar(χ) over tilde (0)(1). Data collected by the DELPHI detector in 1994 at 91.2 GeV have been analysed to search for q (q) over bar(gg) over tilde events. No deviation from Standard Model predictions is observed and a gluino mass between 2 and 18 GeV/c(2) is excluded at the 95% confidence level in these models. Then, R-hadrons produced in the squark decays were searched for in the data collected by DELPHI at the centre-of-mass energies of 189 to 208 GeV, corresponding to an overall integrated luminosity of 609 pb(-1). The observed number of events is in agreement with the Standard Model predictions. Limits at 95% confidence level are derived on the squark masses from the excluded regions in the plane (m((q) over tilde1),m((g) over bar)): m((t) over tilde1) > 90 GeV/c(2) and m((b) over tilde1) > 96 GeV/c(2) for purely left squarks. m((t) over tilde1) > 87 GeV/c(2) and m((b) over tilde1) > 82 GeV/c(2) independent of the mixing angle.

AB - In some supersymmetric models, the gluino ((g) over tilde) is predicted to be light and stable. In that case, it would hadronize to form R-hadrons. In these models, the missing energy signature of the lightest supersymmetric particle is no longer valid, even if R-parity is conserved. Therefore, such a gluino is not constrained by hadron collider results, which looked for the decay (g) over tilde --> q (q) over bar(χ) over tilde (0)(1). Data collected by the DELPHI detector in 1994 at 91.2 GeV have been analysed to search for q (q) over bar(gg) over tilde events. No deviation from Standard Model predictions is observed and a gluino mass between 2 and 18 GeV/c(2) is excluded at the 95% confidence level in these models. Then, R-hadrons produced in the squark decays were searched for in the data collected by DELPHI at the centre-of-mass energies of 189 to 208 GeV, corresponding to an overall integrated luminosity of 609 pb(-1). The observed number of events is in agreement with the Standard Model predictions. Limits at 95% confidence level are derived on the squark masses from the excluded regions in the plane (m((q) over tilde1),m((g) over bar)): m((t) over tilde1) > 90 GeV/c(2) and m((b) over tilde1) > 96 GeV/c(2) for purely left squarks. m((t) over tilde1) > 87 GeV/c(2) and m((b) over tilde1) > 82 GeV/c(2) independent of the mixing angle.

U2 - 10.1140/epjc/s2002-01111-5

DO - 10.1140/epjc/s2002-01111-5

M3 - Article

SN - 1434-6044

VL - 26

SP - 505

EP - 525

JO - European Physical Journal C. Particles and Fields

JF - European Physical Journal C. Particles and Fields

IS - 4

ER -

Search for an LSP gluino at LEP with the DELPHI detector

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