Invariant jet mass measurements in pp collisions at √s = 200 GeV at RHIC

• Verfasst von: Abdallah, Mohamed Samy [VerfasserIn]
• Verfasst von: Deppner, Ingo Martin [VerfasserIn]
• Verfasst von: Herrmann, Norbert [VerfasserIn]
• Verfasst von: Söhngen, Yannick [VerfasserIn]
• Verfasst von: Weidenkaff, Philipp [VerfasserIn]
• Titel: Invariant jet mass measurements in pp collisions at √s = 200 GeV at RHIC
• Körperschaft: STAR Collaboration [VerfasserIn]
• Verf.angabe: M.S. Abdallah, I.M. Deppner, N. Herrmann, Y. Söhngen, P.C. Weidenkaff, und weitere 384 (STAR Collaboration, )
• E-Jahr: 2021
• Jahr: 15 September 2021
• Umfang: 13 S.
• Fussnoten: Im Titel steht der Buchstabe s unter dem Wurzelsymbol ; Gesehen am 12.11.2021
• Titel Quelle: Enthalten in: Physical review
• Ort Quelle: Woodbury, NY : Inst., 2016
• Jahr Quelle: 2021
• Band/Heft Quelle: 104(2021), 5, Artikel-ID 052007, Seite 1-13
• ISSN Quelle: 2470-0029
• DOI: doi:10.1103/PhysRevD.104.052007
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1777377269

Abstract

We present the first inclusive measurements of the invariant and softdrop jet mass in proton-proton collisions at √s=200 GeV at STAR. The measurements are fully corrected for detector effects, and reported differentially in both the jet transverse momentum and jet radius parameter. We compare the measurements to established leading-order Monte Carlo event generators and find that STAR-tuned pythia-6 reproduces the data, while LHC tunes of pythia-8 and herwig-7 do not agree with the data, providing further constraints on parameter tuning. Finally, we observe that softdrop grooming, for which the contribution of wide-angle nonperturbative radiation is suppressed, shifts the jet mass distributions into closer agreement with the partonic jet mass as determined by both pythia-8 and a next-to-leading-logarithmic accuracy perturbative QCD calculation. These measurements complement recent LHC measurements in a different kinematic region, as well as establish a baseline for future jet mass measurements in heavy-ion collisions at RHIC.