Invariant jet mass measurements in pp collisions at root S=200 GeV at RHIC

0547000 - ÚJF 2022 RIV US eng J - Journal Article
Abdallah, M. S. - Adam, J. - Adamczyk, L. - Adams, J. R. - Adkins, J. K. - Agakishiev, G. - Bielčík, J. - Bielčíková, Jana - Federič, Pavol - Holub, L. - Chaloupka, P. - Kosarzewski, L. K. - Kramárik, L. - Líčeník, Robert - Ponimatkin, Georgij - Prozorova, V. - Robotková, Monika - Rusňák, Jan - Šimko, Miroslav - Šumbera, Michal - Truhlář, T. - Trzeciak, B. A. - Vaněk, Jan … Total 338 authors
Invariant jet mass measurements in pp collisions at root S=200 GeV at RHIC.
Physical Review D. Roč. 104, č. 5 (2021), č. článku 052007. ISSN 2470-0010. E-ISSN 2470-0029
R&D Projects: GA MŠMT LTT18002
Research Infrastructure: BNL-CZ II - 90109
Institutional support: RVO:61389005
Keywords : STAR collaboration * proton-proton collisions * jet mass
OECD category: Particles and field physics
Impact factor: 5.407, year: 2021
Method of publishing: Open access
https://doi.org/10.1103/PhysRevD.104.052007

We present the first inclusive measurements of the invariant and SOFTDROP jet mass in proton-proton collisions at root 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 SOFIDROP 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.
Permanent Link: http://hdl.handle.net/11104/0323365