Measurement of groomed jet substructure observables in p plus p collisions at root s=200 GeV with STAR

doi:10.1016/j.physletb.2020.135846

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Measurement of groomed jet substructure observables in p plus p collisions at root s=200 GeV with STAR
	Adam, J ; Adamczyk, L ; Adams, JR ; Adkins, JK ; Agakishiev, G ; Aggarwal, MM ; Ahammed, Z ; Alekseev, I ; Anderson, DM ; Aparin, A
刊名	PHYSICS LETTERS B
	2020
卷号	811 页码:-
关键词	SCATTERING
ISSN号	0370-2693
DOI	10.1016/j.physletb.2020.135846
文献子类	期刊论文
英文摘要	In this letter, measurements of the shared momentum fraction (z(g)) and the groomed jet radius (R-g), as defined in the SoftDrop algorithm, are reported in p+p collisions at root s = 200 GeV collected by the STAR experiment. These substructure observables are differentially measured for jets of varying resolution parameters from R = 0.2 - 0.6 in the transverse momentum range 15 < p(T, jet) < 60 GeV/c. These studies show that, in the p(T, jet) range accessible at root s = 200 GeV and with increasing jet resolution parameter and jet transverse momentum, the zg distribution asymptotically converges to the DGLAP splitting kernel for a quark radiating a gluon. The groomed jet radius measurements reflect a momentum-dependent narrowing of the jet structure for jets of a given resolution parameter, i.e., the larger the p(T,jet), the narrower the first splitting. For the first time, these fully corrected measurements are compared to Monte Carlo generators with leading order QCD matrix elements and leading log in the parton shower, and to state-of-the-art theoretical calculations at next-to-leading-log accuracy. We observe that PYTHIA 6 with parameters tuned to reproduce RHIC measurements is able to quantitatively describe data, whereas PYTHIA 8 and HERWIG 7, tuned to reproduce LHC data, are unable to provide a simultaneous description of both z(g) and R-g, resulting in opportunities for fine parameter tuning of these models for p+p collisions at RHIC energies. We also find that the theoretical calculations without non-perturbative corrections are able to qualitatively describe the trend in data for jets of large resolution parameters at high p(T,jet), but fail at small jet resolution parameters and low jet transverse momenta. (C) 2020 The Author(s). Published by Elsevier B.V.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32993]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Univ Jammu, Jammu 180001, India 2.Joint Inst Nucl Res, Dubna 141980, Russia 3.Kent State Univ, Kent, OH 44242 USA 4.Univ Kentucky, Lexington, KY 40506 USA (3 5.Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA 6.Lehigh Univ, Bethlehem, PA 18015 USA 7.Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany 8.Abilene Christian Univ, Abilene, TX 79699 USA 9.Michigan State Univ, E Lansing, MI 48824 USA 10.Natl Res Nucl Univ MEPhI, Moscow 115409, Russia
推荐引用方式 GB/T 7714	Adam, J,Adamczyk, L,Adams, JR,et al. Measurement of groomed jet substructure observables in p plus p collisions at root s=200 GeV with STAR[J]. PHYSICS LETTERS B,2020,811:-.
APA	Adam, J.,Adamczyk, L.,Adams, JR.,Adkins, JK.,Agakishiev, G.,...&Zyzak, M.(2020).Measurement of groomed jet substructure observables in p plus p collisions at root s=200 GeV with STAR.PHYSICS LETTERS B,811,-.
MLA	Adam, J,et al."Measurement of groomed jet substructure observables in p plus p collisions at root s=200 GeV with STAR".PHYSICS LETTERS B 811(2020):-.