Exclusive production of double J/ψ mesons in hadronic collisions

被引：18
|
作者：
Harland-Lang, L. A. [1 ]
Khoze, V. A. [1 ,2 ]
Ryskin, M. G. [2 ]
机构：
[1] Univ Durham, Inst Particle Phys Phenomenol, Durham DH1 3LE, England
[2] NRC Kurchatov Inst, Petersburg Nucl Phys Inst, St Petersburg 188300, Russia
来源：
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2015年 / 42卷 / 05期
关键词：
particle physics phenomenology; quarkonium physics; diffraction; QCD; PARTON DISTRIBUTIONS; QUANTUM CHROMODYNAMICS; RADIATION ZEROS; PAIR PRODUCTION; SMALL-X; LHC; HIGGS; TEVATRON; PHYSICS; ELECTROPRODUCTION;
D O I：
10.1088/0954-3899/42/5/055001
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We present the first calculation of exclusive double J/psi production in hadronic collisions. We analyse in detail the form of the Born-level gg -> J/psi J/psi amplitudes within the non-relativistic quarkonium approximation and discuss the implications of this for the central exclusive production channel, within the 'Durham' perturbative model. In addition we show that this direct single parton scattering contribution is expected to be strongly dominant in the exclusive case. We present predictions for the LHC and show that the expected cross sections are in fair agreement with the LHCb Run-I measurement of exclusive double J/psi production, with the measured invariant mass distribution described well by the theory. Motivated by this encouraging result we present predictions for observables that may be measured in LHC Run-II, and estimate the size of the expected cross sections in the psi(2S) and chi(c) cases.
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页数：21
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