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 ffiffiffi sp ¼ 7 TeV. Jets with pseudor-apidity jηj < 0.5 are reconstructed from charged particles using the anti-kT jet-finding algorithm with a resolution parameter R ¼ 0.4. The jet cross section is measured in the transverse momentum interval 5 ≤ pch jet T < 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 +PYTHIA 8. The charged jet cross section is well described by POWHEG for the entire measured range of pch jet T . For pch jet T > 40 GeV=c, the PYTHIA calculations also agree with the measured charged jet cross section. PYTHIA 6 simulations describe the fragmentation distributions to 15%. Larger discrepancies are observed for PYTHIA 8.
Charged jet cross section and fragmentation in proton-proton collisions at $\sqrt{s}$ = 7 TeV / The ALICE collaboration, ., Acharya, S., Adamová, D., Adhya, S.P., Adler, A., Adolfsson, J., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahn, S.U., Aiola, S., Akindinov, A., Al-Turany, M., Alam, S.N., Albuquerque, D.S.D., Aleksandrov, D., Alessandro, B., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 99:1(2019). [10.1103/PhysRevD.99.012016]
Charged jet cross section and fragmentation in proton-proton collisions at $\sqrt{s}$ = 7 TeV
L. CunqueiroMembro del Collaboration Group
;
2019
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 ffiffiffi sp ¼ 7 TeV. Jets with pseudor-apidity jηj < 0.5 are reconstructed from charged particles using the anti-kT jet-finding algorithm with a resolution parameter R ¼ 0.4. The jet cross section is measured in the transverse momentum interval 5 ≤ pch jet T < 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 +PYTHIA 8. The charged jet cross section is well described by POWHEG for the entire measured range of pch jet T . For pch jet T > 40 GeV=c, the PYTHIA calculations also agree with the measured charged jet cross section. PYTHIA 6 simulations describe the fragmentation distributions to 15%. Larger discrepancies are observed for PYTHIA 8.| File | Dimensione | Formato | |
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