Performance of the ATLAS track reconstruction algorithms in dense environments in LHC Run 2

Research output: Contribution to journalArticle

Standard

Performance of the ATLAS track reconstruction algorithms in dense environments in LHC Run 2. / Aaboud, M; Aad, G; Abbott, B.; Abdallah, J; Abdinov, O; Abeloos, B; Åkesson, Torsten; Bocchetta, Simona; Doglioni, Caterina; Hedberg, Vincent; Jarlskog, Göran; Kalderon, Charles; Lytken, Else; Mjörnmark, Ulf; Poulsen, Trine; Smirnova, Oxana; Viazlo, Oleksandr; ALICE Collaboration.

In: European Physical Journal C, Vol. 77, No. 10, 673, 2017.

Research output: Contribution to journalArticle

Harvard

APA

Aaboud, M., Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Abeloos, B., ... ALICE Collaboration (2017). Performance of the ATLAS track reconstruction algorithms in dense environments in LHC Run 2. European Physical Journal C, 77(10), [673]. https://doi.org/10.1140/epjc/s10052-017-5225-7

CBE

MLA

Vancouver

Author

Aaboud, M ; Aad, G ; Abbott, B. ; Abdallah, J ; Abdinov, O ; Abeloos, B ; Åkesson, Torsten ; Bocchetta, Simona ; Doglioni, Caterina ; Hedberg, Vincent ; Jarlskog, Göran ; Kalderon, Charles ; Lytken, Else ; Mjörnmark, Ulf ; Poulsen, Trine ; Smirnova, Oxana ; Viazlo, Oleksandr ; ALICE Collaboration. / Performance of the ATLAS track reconstruction algorithms in dense environments in LHC Run 2. In: European Physical Journal C. 2017 ; Vol. 77, No. 10.

RIS

TY - JOUR

T1 - Performance of the ATLAS track reconstruction algorithms in dense environments in LHC Run 2

AU - Aaboud, M

AU - Aad, G

AU - Abbott, B.

AU - Abdallah, J

AU - Abdinov, O

AU - Abeloos, B

AU - Åkesson, Torsten

AU - Bocchetta, Simona

AU - Doglioni, Caterina

AU - Hedberg, Vincent

AU - Jarlskog, Göran

AU - Kalderon, Charles

AU - Lytken, Else

AU - Mjörnmark, Ulf

AU - Poulsen, Trine

AU - Smirnova, Oxana

AU - Viazlo, Oleksandr

AU - ALICE Collaboration

N1 - Export Date: 30 October 2017

PY - 2017

Y1 - 2017

N2 - With the increase in energy of the Large Hadron Collider to a centre-of-mass energy of 13 TeV for Run 2, events with dense environments, such as in the cores of high-energy jets, became a focus for new physics searches as well as measurements of the Standard Model. These environments are characterized by charged-particle separations of the order of the tracking detectors sensor granularity. Basic track quantities are compared between 3.2 fb- 1 of data collected by the ATLAS experiment and simulation of proton–proton collisions producing high-transverse-momentum jets at a centre-of-mass energy of 13 TeV. The impact of charged-particle separations and multiplicities on the track reconstruction performance is discussed. The track reconstruction efficiency in the cores of jets with transverse momenta between 200 and 1600 GeV is quantified using a novel, data-driven, method. The method uses the energy loss, dE/dx, to identify pixel clusters originating from two charged particles. Of the charged particles creating these clusters, the measured fraction that fail to be reconstructed is 0.061±0.006(stat.)±0.014(syst.) and 0.093±0.017(stat.)±0.021(syst.) for jet transverse momenta of 200–400 GeV and 1400–1600 GeV , respectively. © 2017, CERN for the benefit of the ATLAS Collaboration.

AB - With the increase in energy of the Large Hadron Collider to a centre-of-mass energy of 13 TeV for Run 2, events with dense environments, such as in the cores of high-energy jets, became a focus for new physics searches as well as measurements of the Standard Model. These environments are characterized by charged-particle separations of the order of the tracking detectors sensor granularity. Basic track quantities are compared between 3.2 fb- 1 of data collected by the ATLAS experiment and simulation of proton–proton collisions producing high-transverse-momentum jets at a centre-of-mass energy of 13 TeV. The impact of charged-particle separations and multiplicities on the track reconstruction performance is discussed. The track reconstruction efficiency in the cores of jets with transverse momenta between 200 and 1600 GeV is quantified using a novel, data-driven, method. The method uses the energy loss, dE/dx, to identify pixel clusters originating from two charged particles. Of the charged particles creating these clusters, the measured fraction that fail to be reconstructed is 0.061±0.006(stat.)±0.014(syst.) and 0.093±0.017(stat.)±0.021(syst.) for jet transverse momenta of 200–400 GeV and 1400–1600 GeV , respectively. © 2017, CERN for the benefit of the ATLAS Collaboration.

U2 - 10.1140/epjc/s10052-017-5225-7

DO - 10.1140/epjc/s10052-017-5225-7

M3 - Article

VL - 77

JO - European Physical Journal C

T2 - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 10

M1 - 673

ER -