TY - JOUR
T1 - Quarkonium polarization and the long distance matrix elements hierarchies using jet substructure
AU - Dai, Lin
AU - Shrivastava, Prashant
N1 - Funding Information:
The authors would like to thank Adam Leibovich and Ira Rothstein for their guidance and comments on the manuscript. We would also like to thank James Russ for useful discussions. L. D. was supported in part by NSF Grant No. PHY-1519175. P. S. is supported in part by DOE Grants DOE DE-FG02-04ER41338 and FG02-06ER41449.
Publisher Copyright:
© 2017 American Physical Society.
PY - 2017/8/31
Y1 - 2017/8/31
N2 - We investigate the quarkonium production mechanisms in jets at the LHC, using the fragmenting jet functions (FJF) approach. Specifically, we discuss the jet energy dependence of the J/ψ production cross section at the LHC. By comparing the cross sections for the different NRQCD production channels (S10[8], S31[8], P3J[8], and S31[1]), we find that at fixed values of energy fraction z carried by the J/ψ, if the normalized cross section is a decreasing function of the jet energy, in particular for z>0.5, then the depolarizing S10[8] must be the dominant channel. This makes the prediction made in [Baumgart et al., J. High Energy Phys. 11 (2014) 003JHEPFG1029-847910.1007/JHEP11(2014)003] for the FJF's also true for the cross section. We also make comparisons between the long distance matrix elements extracted by various groups. This analysis could potentially shed light on the polarization properties of the J/ψ production in high pT region.
AB - We investigate the quarkonium production mechanisms in jets at the LHC, using the fragmenting jet functions (FJF) approach. Specifically, we discuss the jet energy dependence of the J/ψ production cross section at the LHC. By comparing the cross sections for the different NRQCD production channels (S10[8], S31[8], P3J[8], and S31[1]), we find that at fixed values of energy fraction z carried by the J/ψ, if the normalized cross section is a decreasing function of the jet energy, in particular for z>0.5, then the depolarizing S10[8] must be the dominant channel. This makes the prediction made in [Baumgart et al., J. High Energy Phys. 11 (2014) 003JHEPFG1029-847910.1007/JHEP11(2014)003] for the FJF's also true for the cross section. We also make comparisons between the long distance matrix elements extracted by various groups. This analysis could potentially shed light on the polarization properties of the J/ψ production in high pT region.
UR - http://www.scopus.com/inward/record.url?scp=85053513728&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.96.036020
DO - 10.1103/PhysRevD.96.036020
M3 - Article
AN - SCOPUS:85053513728
SN - 2470-0010
VL - 96
JO - Physical Review D
JF - Physical Review D
IS - 3
M1 - 036020
ER -