Polarization measurements in neutral pion photoproduction

K Wijesooriya; A Afanasev; M Amarian; K Aniol; S Becher; K Benslama; L Bimbot; P Bosted; EJ Brash; J Calarco; Z Chai; CC Chang; T Chang; JP Chen; S Choi; E Chudakov; S Churchwell; D Crovelli; S Dieterich; S Dumalski; D Dutta; M Epstein; Kevin Fissum; B Fox; S Frullani; H Gao; J Gao; F Garibaldi; O Gayou; R Gilman; A Glamazdin; C Glashausser; J Gomez; V Gorbenko; O Hansen; RJ Holt; J Hovdebo; GM Huber; CW de Jager; X Jiang; C Jones; MK Jones; J Kelly; E Kinney; E Kooijman; G Kumbartzki; M Kuss; J LeRose; M Liang; R Lindgren; N Liyanage; S Malov; DJ Margaziotis; P Markowitz; K McCormick; D Meekins; ZE Meziani; R Michaels; J Mitchell; L Morand; CF Perdrisat; R Pomatsalyuk; V Punjabi; RD Ransome; R Roche; M Rvachev; A Saha; A Sarty; EC Schulte; D Simon; S Strauch; R Suleiman; L Todor; PE Ulmer; GM Urciuoli; B Wojtsekhowski; F Xiong; W Xu

doi:10.1103/PhysRevC.66.034614

Polarization measurements in neutral pion photoproduction

K Wijesooriya, A Afanasev, M Amarian, K Aniol, S Becher, K Benslama, L Bimbot, P Bosted, EJ Brash, J Calarco, Z Chai, CC Chang, T Chang, JP Chen, S Choi, E Chudakov, S Churchwell, D Crovelli, S Dieterich, S DumalskiD Dutta, M Epstein, Kevin Fissum, B Fox, S Frullani, H Gao, J Gao, F Garibaldi, O Gayou, R Gilman, A Glamazdin, C Glashausser, J Gomez, V Gorbenko, O Hansen, RJ Holt, J Hovdebo, GM Huber, CW de Jager, X Jiang, C Jones, MK Jones, J Kelly, E Kinney, E Kooijman, G Kumbartzki, M Kuss, J LeRose, M Liang, R Lindgren, N Liyanage, S Malov, DJ Margaziotis, P Markowitz, K McCormick, D Meekins, ZE Meziani, R Michaels, J Mitchell, L Morand, CF Perdrisat, R Pomatsalyuk, V Punjabi, RD Ransome, R Roche, M Rvachev, A Saha, A Sarty, EC Schulte, D Simon, S Strauch, R Suleiman, L Todor, PE Ulmer, GM Urciuoli, B Wojtsekhowski, F Xiong, W Xu

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

Abstract

We present measurements of the recoil proton polarization for the H-1((γ) over right arrow,(p) over right arrow)pi(0) reaction for theta(c.m.)(pi) = 60degrees-135degrees and for photon energies up to 4.1 GeV. These are the first data in this reaction for polarization transfer with circularly polarized photons. Various theoretical models are compared with the results. No evidence for hadron helicity conservation is observed. Models that employ factorization are not favored. It appears from the strong angular dependence of the induced polarization at photon energies of 2.5 and 3.1 GeV that a relatively high spin resonance or background amplitude might exist in this energy region.

Original language	English
Journal	Physical Review C (Nuclear Physics)
Volume	66
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.66.034614
Publication status	Published - 2002

Subject classification (UKÄ)

Subatomic Physics

Access to Document

10.1103/PhysRevC.66.034614

1 Finished
1 Active

Production of Mesons with Electromagnetic Beams
Fissum, K. (Researcher)
1988/06/01 → …
Project: Research

File
Investigations of and with Polarized Electromagnetic Beams
Fissum, K. (Researcher)
1999/01/01 → 2018/12/31
Project: Research

Cite this

Wijesooriya, K., Afanasev, A., Amarian, M., Aniol, K., Becher, S., Benslama, K., Bimbot, L., Bosted, P., Brash, EJ., Calarco, J., Chai, Z., Chang, CC., Chang, T., Chen, JP., Choi, S., Chudakov, E., Churchwell, S., Crovelli, D., Dieterich, S., ... Xu, W. (2002). Polarization measurements in neutral pion photoproduction. Physical Review C (Nuclear Physics), 66(3). https://doi.org/10.1103/PhysRevC.66.034614

@article{c7b7343c33694ad7a4f274240df0ffbf,

title = "Polarization measurements in neutral pion photoproduction",

abstract = "We present measurements of the recoil proton polarization for the H-1((γ) over right arrow,(p) over right arrow)pi(0) reaction for theta(c.m.)(pi) = 60degrees-135degrees and for photon energies up to 4.1 GeV. These are the first data in this reaction for polarization transfer with circularly polarized photons. Various theoretical models are compared with the results. No evidence for hadron helicity conservation is observed. Models that employ factorization are not favored. It appears from the strong angular dependence of the induced polarization at photon energies of 2.5 and 3.1 GeV that a relatively high spin resonance or background amplitude might exist in this energy region.",

author = "K Wijesooriya and A Afanasev and M Amarian and K Aniol and S Becher and K Benslama and L Bimbot and P Bosted and EJ Brash and J Calarco and Z Chai and CC Chang and T Chang and JP Chen and S Choi and E Chudakov and S Churchwell and D Crovelli and S Dieterich and S Dumalski and D Dutta and M Epstein and Kevin Fissum and B Fox and S Frullani and H Gao and J Gao and F Garibaldi and O Gayou and R Gilman and A Glamazdin and C Glashausser and J Gomez and V Gorbenko and O Hansen and RJ Holt and J Hovdebo and GM Huber and {de Jager}, CW and X Jiang and C Jones and MK Jones and J Kelly and E Kinney and E Kooijman and G Kumbartzki and M Kuss and J LeRose and M Liang and R Lindgren and N Liyanage and S Malov and DJ Margaziotis and P Markowitz and K McCormick and D Meekins and ZE Meziani and R Michaels and J Mitchell and L Morand and CF Perdrisat and R Pomatsalyuk and V Punjabi and RD Ransome and R Roche and M Rvachev and A Saha and A Sarty and EC Schulte and D Simon and S Strauch and R Suleiman and L Todor and PE Ulmer and GM Urciuoli and B Wojtsekhowski and F Xiong and W Xu",

year = "2002",

doi = "10.1103/PhysRevC.66.034614",

language = "English",

volume = "66",

journal = "Physical Review C (Nuclear Physics)",

issn = "0556-2813",

publisher = "American Physical Society",

number = "3",

}

Wijesooriya, K, Afanasev, A, Amarian, M, Aniol, K, Becher, S, Benslama, K, Bimbot, L, Bosted, P, Brash, EJ, Calarco, J, Chai, Z, Chang, CC, Chang, T, Chen, JP, Choi, S, Chudakov, E, Churchwell, S, Crovelli, D, Dieterich, S, Dumalski, S, Dutta, D, Epstein, M, Fissum, K, Fox, B, Frullani, S, Gao, H, Gao, J, Garibaldi, F, Gayou, O, Gilman, R, Glamazdin, A, Glashausser, C, Gomez, J, Gorbenko, V, Hansen, O, Holt, RJ, Hovdebo, J, Huber, GM, de Jager, CW, Jiang, X, Jones, C, Jones, MK, Kelly, J, Kinney, E, Kooijman, E, Kumbartzki, G, Kuss, M, LeRose, J, Liang, M, Lindgren, R, Liyanage, N, Malov, S, Margaziotis, DJ, Markowitz, P, McCormick, K, Meekins, D, Meziani, ZE, Michaels, R, Mitchell, J, Morand, L, Perdrisat, CF, Pomatsalyuk, R, Punjabi, V, Ransome, RD, Roche, R, Rvachev, M, Saha, A, Sarty, A, Schulte, EC, Simon, D, Strauch, S, Suleiman, R, Todor, L, Ulmer, PE, Urciuoli, GM, Wojtsekhowski, B, Xiong, F & Xu, W 2002, 'Polarization measurements in neutral pion photoproduction', Physical Review C (Nuclear Physics), vol. 66, no. 3. https://doi.org/10.1103/PhysRevC.66.034614

TY - JOUR

T1 - Polarization measurements in neutral pion photoproduction

AU - Wijesooriya, K

AU - Afanasev, A

AU - Amarian, M

AU - Aniol, K

AU - Becher, S

AU - Benslama, K

AU - Bimbot, L

AU - Bosted, P

AU - Brash, EJ

AU - Calarco, J

AU - Chai, Z

AU - Chang, CC

AU - Chang, T

AU - Chen, JP

AU - Choi, S

AU - Chudakov, E

AU - Churchwell, S

AU - Crovelli, D

AU - Dieterich, S

AU - Dumalski, S

AU - Dutta, D

AU - Epstein, M

AU - Fissum, Kevin

AU - Fox, B

AU - Frullani, S

AU - Gao, H

AU - Gao, J

AU - Garibaldi, F

AU - Gayou, O

AU - Gilman, R

AU - Glamazdin, A

AU - Glashausser, C

AU - Gomez, J

AU - Gorbenko, V

AU - Hansen, O

AU - Holt, RJ

AU - Hovdebo, J

AU - Huber, GM

AU - de Jager, CW

AU - Jiang, X

AU - Jones, C

AU - Jones, MK

AU - Kelly, J

AU - Kinney, E

AU - Kooijman, E

AU - Kumbartzki, G

AU - Kuss, M

AU - LeRose, J

AU - Liang, M

AU - Lindgren, R

AU - Liyanage, N

AU - Malov, S

AU - Margaziotis, DJ

AU - Markowitz, P

AU - McCormick, K

AU - Meekins, D

AU - Meziani, ZE

AU - Michaels, R

AU - Mitchell, J

AU - Morand, L

AU - Perdrisat, CF

AU - Pomatsalyuk, R

AU - Punjabi, V

AU - Ransome, RD

AU - Roche, R

AU - Rvachev, M

AU - Saha, A

AU - Sarty, A

AU - Schulte, EC

AU - Simon, D

AU - Strauch, S

AU - Suleiman, R

AU - Todor, L

AU - Ulmer, PE

AU - Urciuoli, GM

AU - Wojtsekhowski, B

AU - Xiong, F

AU - Xu, W

PY - 2002

Y1 - 2002

N2 - We present measurements of the recoil proton polarization for the H-1((γ) over right arrow,(p) over right arrow)pi(0) reaction for theta(c.m.)(pi) = 60degrees-135degrees and for photon energies up to 4.1 GeV. These are the first data in this reaction for polarization transfer with circularly polarized photons. Various theoretical models are compared with the results. No evidence for hadron helicity conservation is observed. Models that employ factorization are not favored. It appears from the strong angular dependence of the induced polarization at photon energies of 2.5 and 3.1 GeV that a relatively high spin resonance or background amplitude might exist in this energy region.

AB - We present measurements of the recoil proton polarization for the H-1((γ) over right arrow,(p) over right arrow)pi(0) reaction for theta(c.m.)(pi) = 60degrees-135degrees and for photon energies up to 4.1 GeV. These are the first data in this reaction for polarization transfer with circularly polarized photons. Various theoretical models are compared with the results. No evidence for hadron helicity conservation is observed. Models that employ factorization are not favored. It appears from the strong angular dependence of the induced polarization at photon energies of 2.5 and 3.1 GeV that a relatively high spin resonance or background amplitude might exist in this energy region.

U2 - 10.1103/PhysRevC.66.034614

DO - 10.1103/PhysRevC.66.034614

M3 - Article

SN - 0556-2813

VL - 66

JO - Physical Review C (Nuclear Physics)

JF - Physical Review C (Nuclear Physics)

IS - 3

ER -

Polarization measurements in neutral pion photoproduction

Abstract

Subject classification (UKÄ)

Access to Document

Fingerprint

Projects

Production of Mesons with Electromagnetic Beams

Investigations of and with Polarized Electromagnetic Beams

Cite this