@Article{LHCbCollaborationAaij_etal2015,
author="LHCb Collaboration (Aaij, R. et al
and Martinez-Vidal, F.
and Oyanguren, A.
and Ruiz Valls, P.
and Sanchez Mayordomo, C.",
title="Measurement of the exclusive gamma production cross-section in pp collisions at root s=7 TeV and 8 TeV",
journal="Journal of High Energy Physics",
year="2015",
publisher="Springer",
volume="09",
number="9",
pages="084--20pp",
optkeywords="Diffraction; Hadron-Hadron Scattering; Forward physics; Particle and resonance production; Heavy quark production",
abstract="A study is presented of central exclusive production of gamma(n S) states, where the gamma (n S) resonances decay to the mu(+) mu(-) final state, using p p collision data recorded by the LHCb experiment. The cross-section is measured in the rapidity range 2 < y (gamma) < 4.5 where the muons are reconstructed in the pseudorapidity range 2 < eta (mu(+/-)) < 4.5. The data sample corresponds to an integrated luminosity of 2.9 fb(-1) and was collected at centreof- mass energies of 7TeV and 8TeV. The measured gamma(1 S) and gamma(2 S) production crosssections are sigma(pp -> p gamma(1S)p) = 9.0 +/- 1.7 pb and sigma(pp -> p gamma(2S)p) = 1.3 +/- 0.3 pb, where the first uncertainties are statistical and the second are systematic. The gamma (1S) cross-section is also measured as a function of rapidity and is found to be in good agreement with Standard Model predictions. An upper limit is set at 3.4 pb at the 95{\%} confidence level for the exclusive gamma(3 S) production cross-section, including possible contamination from chi b (3P) -> gamma (3S)gamma decays.",
optnote="WOS:000361555400002",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2395), last updated on Fri, 16 Oct 2015 10:24:01 +0000",
issn="1029-8479",
doi="10.1007/JHEP09(2015)084",
opturl="http://arxiv.org/abs/1505.08139",
opturl="https://doi.org/10.1007/JHEP09(2015)084",
archivePrefix="arXiv",
eprint="1505.08139",
language="English"
}