We report the differential charged jet cross section and jet fragmentation distributions measured with the pffiffi ALICE detector in proton-proton collisions at a center-of-mass energy s 1⁄4 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 1⁄4 0.4. The jet cross section is measured in the transverse momentum interval 5 ≤ pch jet < 100 GeV=c. Jet fragmentation is studied measuring the scaled transverse momentum spectra T 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 pch jet. For pch jet > 40 GeV=c, the PYTHIA calculations also agree TT with the measured charged jet cross section. PYTHIA6 simulations describe the fragmentation distributions to 15%. Larger discrepancies are observed for PYTHIA8.

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

Barioglio L.;Beole S.;Bianchi L.;Botta E.;Ferretti A.;Gagliardi M.;Masera M.;Puccio M.;Trogolo S.;Vercellin E.;
2019-01-01

Abstract

We report the differential charged jet cross section and jet fragmentation distributions measured with the pffiffi ALICE detector in proton-proton collisions at a center-of-mass energy s 1⁄4 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 1⁄4 0.4. The jet cross section is measured in the transverse momentum interval 5 ≤ pch jet < 100 GeV=c. Jet fragmentation is studied measuring the scaled transverse momentum spectra T 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 pch jet. For pch jet > 40 GeV=c, the PYTHIA calculations also agree TT with the measured charged jet cross section. PYTHIA6 simulations describe the fragmentation distributions to 15%. Larger discrepancies are observed for PYTHIA8.
2019
99
1
012016
012016
http://harvest.aps.org/bagit/articles/10.1103/PhysRevD.99.012016/apsxml
Acharya S.; Adamova D.; Adler A.; Adolfsson J.; Aggarwal M.M.; Aglieri Rinella G.; Agnello M.; Agrawal N.; Ahammed Z.; Ahn S.U.; Aiola S.; Akindinov A...espandi
File in questo prodotto:
File Dimensione Formato  
PhysRevD.99.012016.pdf

Accesso aperto

Tipo di file: PDF EDITORIALE
Dimensione 502.95 kB
Formato Adobe PDF
502.95 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1710778
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 25
  • ???jsp.display-item.citation.isi??? 8
social impact