Phenomenological NLO analysis of η c production at the LHC in the collider and fixed-target modes

Feng, Yu (Department of Physics, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China) ; He, Jibo (LAL, Université Paris-Saclay, Univ. Paris-Sud, CNRS/IN2P3, Orsay Cedex, F-91898, France) (School of Physical Sciences, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, Shijingshan District, 100049, China) ; Lansberg, Jean-Philippe (IPNO, Université Paris-Saclay, Univ. Paris-Sud, CNRS/IN2P3, Orsay Cedex, F-91406, France) ; Shao, Hua-Sheng (LPTHE, UMR 7589, Sorbonne Universités, CNRS, Paris Cedex 05, F-75252, France) ; Usachov, Andrii (LAL, Université Paris-Saclay, Univ. Paris-Sud, CNRS/IN2P3, Orsay Cedex, F-91898, France) ; Zhang, Hong-Fei (College of Big Data Statistics, Guizhou University of Finance and Economics, Guiyang, 550025, China)

19 June 2019

Abstract: In view of the good agreement between the LHCb prompt- ηc data at s=7 and 8 TeV and the NLO colour-singlet model predictions – i.e. the leading v2 NRQCD contribution–, we provide predictions in the LHCb acceptance for the forthcoming 13 TeV analysis bearing on data taken during the LHC Run2. We also provide predictions for s=115 GeV for proton-hydrogen collisions in the fixed-target mode which could be studied during the LHC Run3. Our predictions are complemented by a full theoretical uncertainty analysis. In addition to cross section predictions, we elaborate on the uncertainties on the pp¯ branching ratio –necessary for data-theory comparison– and discuss other usable branching fractions for future studies.


Published in: Nuclear Physics B 945 (2019) DOI: 10.1016/j.nuclphysb.2019.114662
License: CC-BY-3.0



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