Study of central exclusive $\pi^+\pi^-$ production in proton-proton collisions at $\sqrt{s} =$ 5.02 and 13 TeV - INSPIRE

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Study of central exclusive $\pi^+\pi^-$ production in proton-proton collisions at $\sqrt{s} =$ 5.02 and 13 TeV

CMS

Collaboration

Mar 5, 2020

28 pages

Published in:

Eur.Phys.J.C 80 (2020) 8, 718

Published: Aug 10, 2020

e-Print:

2003.02811 [hep-ex]

DOI:

10.1140/epjc/s10052-020-8166-5

Report number:

CMS-FSQ-16-006,
CERN-EP-2020-005

Experiments:

CERN-LHC-CMS

View in:

reference search19 citations

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Abstract: (Springer)

Central exclusive and semiexclusive production of pairs is measured with the CMS detector in proton-proton collisions at the LHC at center-of-mass energies of 5.02 and 13TeV. The theoretical description of these nonperturbative processes, which have not yet been measured in detail at the LHC, poses a significant challenge to models. The two pions are measured and identified in the CMS silicon tracker based on specific energy loss, whereas the absence of other particles is ensured by calorimeter information. The total and differential cross sections of exclusive and semiexclusive central production are measured as functions of invariant mass, transverse momentum, and rapidity of the system in the fiducial region defined as transverse momentum and pseudorapidity . The production cross sections for the four resonant channels [inline-graphic not available: see fulltext], , [inline-graphic not available: see fulltext], and [inline-graphic not available: see fulltext]are extracted using a simple model. These results represent the first measurement of this process at the LHC collision energies of 5.02 and 13TeV.

Note:

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/FSQ-16-006 (CMS Public Pages)

p p: scattering
p p: colliding beams
pi: pair production
pi: particle identification
CERN LHC Coll
transverse momentum dependence
rapidity dependence
mass dependence
mass spectrum: (pi+ pi-)
CMS

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