Charged jet cross section and fragmentation in proton-proton collisions at √s = 7 TeV

ALICE Collaboration; S. Acharya; H. A. Andrews; D. Evans; K. L. Graham; O. Jevons; P. G. Jones; A. Jusko; M. Krivda; J. Kvapil; R. Lietava; O. Villalobos Baillie; E. Willsher; N. Zardoshti

doi:10.1103/PhysRevD.99.012016

Charged jet cross section and fragmentation in proton-proton collisions at √s = 7 TeV

ALICE Collaboration, S. Acharya, H. A. Andrews, D. Evans, K. L. Graham, O. Jevons, P. G. Jones, A. Jusko, M. Krivda, J. Kvapil, R. Lietava, O. Villalobos Baillie, E. Willsher, N. Zardoshti

Physics and Astronomy

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Abstract

We report the differential charged jet cross section and jet fragmentation distributions measured with the ALICE detector in proton-proton collisions at a center-of-mass energy √s=7 TeV. Jets with pseudorapidity |η|<0.5 are reconstructed from charged particles using the anti-k_T jet-finding algorithm with a resolution parameter R=0.4. The jet cross section is measured in the transverse momentum interval 5≤p_T^{ch jet}<100 GeV/c. Jet fragmentation is studied measuring the scaled transverse momentum spectra of the charged constituents of jets in four intervals of jet transverse momentum between 5 and 30 GeV/c. The measurements are compared to calculations from the pythia model as well as next-to-leading-order perturbative QCD calculations with powheg+pythia8. The charged jet cross section is well described by powheg for the entire measured range of p_T^{ch jet}. For p_T^{ch jet}>40 GeV/c, the pythia calculations also agree with the measured charged jet cross section. pythia6 simulations describe the fragmentation distributions to 15%. Larger discrepancies are observed for pythia8.

Original language	English
Article number	012016
Number of pages	16
Journal	Physical Review D
Volume	99
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevD.99.012016
Publication status	Published - 31 Jan 2019

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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ALICE_collaboration_Charged_jet_cross_section_and_fragmentation_in_proton_proton_collisions_at_√s_=_7_TeV_Physical_Review_D_2019
S. Acharya et al. (ALICE Collaboration), (2019) Charged jet cross section and fragmentation in proton-proton collisions at √s = 7 TeV, Phys. Rev. D, volume 99, article no. 012016, DOI: 10.1103/PhysRevD.99.012016
Final published version, 503 KBLicence: Creative Commons: Attribution (CC BY)

https://journals.aps.org/prd/abstract/10.1103/PhysRevD.99.012016Licence: Creative Commons: Attribution (CC BY)

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ALICE Collaboration, Acharya, S., Andrews, H. A., Evans, D., Graham, K. L., Jevons, O., Jones, P. G., Jusko, A., Krivda, M., Kvapil, J., Lietava, R., Villalobos Baillie, O., Willsher, E., & Zardoshti, N. (2019). Charged jet cross section and fragmentation in proton-proton collisions at √s = 7 TeV. Physical Review D, 99(1), Article 012016. https://doi.org/10.1103/PhysRevD.99.012016

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title = "Charged jet cross section and fragmentation in proton-proton collisions at √s = 7 TeV",

abstract = "We report the differential charged jet cross section and jet fragmentation distributions measured with the ALICE detector in proton-proton collisions at a center-of-mass energy √s=7 TeV. Jets with pseudorapidity |η|<0.5 are reconstructed from charged particles using the anti-kT jet-finding algorithm with a resolution parameter R=0.4. The jet cross section is measured in the transverse momentum interval 5≤pTch jet<100 GeV/c. Jet fragmentation is studied measuring the scaled transverse momentum spectra of the charged constituents of jets in four intervals of jet transverse momentum between 5 and 30 GeV/c. The measurements are compared to calculations from the pythia model as well as next-to-leading-order perturbative QCD calculations with powheg+pythia8. The charged jet cross section is well described by powheg for the entire measured range of pTch jet. For pTch jet>40 GeV/c, the pythia calculations also agree with the measured charged jet cross section. pythia6 simulations describe the fragmentation distributions to 15%. Larger discrepancies are observed for pythia8.",

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AU - ALICE Collaboration

AU - Acharya, S.

AU - Andrews, H. A.

AU - Evans, D.

AU - Graham, K. L.

AU - Jevons, O.

AU - Jones, P. G.

AU - Jusko, A.

AU - Krivda, M.

AU - Kvapil, J.

AU - Lietava, R.

AU - Villalobos Baillie, O.

AU - Willsher, E.

AU - Zardoshti, N.

PY - 2019/1/31

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N2 - We report the differential charged jet cross section and jet fragmentation distributions measured with the ALICE detector in proton-proton collisions at a center-of-mass energy √s=7 TeV. Jets with pseudorapidity |η|<0.5 are reconstructed from charged particles using the anti-kT jet-finding algorithm with a resolution parameter R=0.4. The jet cross section is measured in the transverse momentum interval 5≤pTch jet<100 GeV/c. Jet fragmentation is studied measuring the scaled transverse momentum spectra of the charged constituents of jets in four intervals of jet transverse momentum between 5 and 30 GeV/c. The measurements are compared to calculations from the pythia model as well as next-to-leading-order perturbative QCD calculations with powheg+pythia8. The charged jet cross section is well described by powheg for the entire measured range of pTch jet. For pTch jet>40 GeV/c, the pythia calculations also agree with the measured charged jet cross section. pythia6 simulations describe the fragmentation distributions to 15%. Larger discrepancies are observed for pythia8.

AB - We report the differential charged jet cross section and jet fragmentation distributions measured with the ALICE detector in proton-proton collisions at a center-of-mass energy √s=7 TeV. Jets with pseudorapidity |η|<0.5 are reconstructed from charged particles using the anti-kT jet-finding algorithm with a resolution parameter R=0.4. The jet cross section is measured in the transverse momentum interval 5≤pTch jet<100 GeV/c. Jet fragmentation is studied measuring the scaled transverse momentum spectra of the charged constituents of jets in four intervals of jet transverse momentum between 5 and 30 GeV/c. The measurements are compared to calculations from the pythia model as well as next-to-leading-order perturbative QCD calculations with powheg+pythia8. The charged jet cross section is well described by powheg for the entire measured range of pTch jet. For pTch jet>40 GeV/c, the pythia calculations also agree with the measured charged jet cross section. pythia6 simulations describe the fragmentation distributions to 15%. Larger discrepancies are observed for pythia8.

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JF - Physical Review D

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Charged jet cross section and fragmentation in proton-proton collisions at √s = 7 TeV

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