Central exclusive meson pair production in the perturbative regime at hadron colliders

被引：29

作者：

Harland-Lang, L. A. ^{[1
]}

Khoze, V. A. ^{[2
,3
,4
]}

Ryskin, M. G. ^{[2
,3
,5
]}

Stirling, W. J. ^{[1
,2
,3
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Univ Durham, Inst Particle Phys Phenomenol, Durham DH1 3LE, England

[3] Univ Durham, Dept Phys, Durham DH1 3LE, England

[4] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

[5] Petersburg Nucl Phys Inst, St Petersburg 188300, Russia

来源：

EUROPEAN PHYSICAL JOURNAL C | 2011年 / 71卷 / 08期

关键词：

DOUBLE POMERON EXCHANGE; PARTON DISTRIBUTIONS; DIFFRACTIVE PROCESSES; RADIATION ZEROS; HIGGS SECTOR; GAUGE-THEORY; GAMMA-GAMMA; AMPLITUDES; LHC; TEVATRON;

D O I：

10.1140/epjc/s10052-011-1714-2

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The central exclusive production (CEP) of heavy resonance states that subsequently decay into meson pairs, MM, is an important signature for such processes at hadron colliders. However, there is a potentially important background from the direct QCD production of meson pairs, as mediated for example by the exclusive gg -> M (M) over bar hard scattering subprocess. This is in fact an interesting process in its own right, testing novel aspects of perturbative QCD technology. We explicitly calculate the gg -> M (M) over bar helicity amplitudes for different meson states within the hard exclusive formalism, and comment on the application of MHV techniques to the calculation. Using these results, we describe how meson pair CEP can be calculated in the perturbative regime, and present some sample numerical predictions for a variety of final states. We also briefly consider the dominant non-perturbative contributions, which are expected to be important when the meson transverse momentum is small.

引用

页码：1 / 22

页数：22

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