Charged jet cross section and fragmentation in proton-proton collisions at root S=7 TeV



Acharya, S, Adamova, D, Adler, A, Adolfsson, J, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahn, SU
et al (show 1006 more authors) (2019) Charged jet cross section and fragmentation in proton-proton collisions at root S=7 TeV. PHYSICAL REVIEW D, 99 (1).

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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-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.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 30 Apr 2019 10:13
Last Modified: 19 Jan 2023 00:52
DOI: 10.1103/PhysRevD.99.012016
Open Access URL: https://doi.org/10.1103/PhysRevD.99.012016
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3039046