Study Of Central Exclusive Pi(+)Pi(-) Production İn Proton-Proton Collisions At Root S=5.02 And 13 Tev

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Küçük Resim

Tarih

2020

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

CMS Collaboration

Erişim Hakkı

Özet

Central exclusive and semiexclusive production of ? + ?? pairs is measured with the CMS detector in protonproton collisions at the LHC at center-of-mass energies of 5.02 and 13 TeV. 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 pT(?) > 0.2 GeV and pseudorapidity |?(?)| < 2.4. The production cross sections for the four resonant channels f0(500), ? 0 (770), f0(980), and f2(1270) are extracted using a simple model. These results represent the first measurement of this process at the LHC collision energies of 5.02 and 13 TeV.

Açıklama

Anahtar Kelimeler

Partıal-Wave Analysıs, Pp Interactıons, Meson, System

Kaynak

WoS Q Değeri

Q2

Scopus Q Değeri

Q2

Cilt

Sayı

Künye

Eur. Phys. J. C (2020) 80:718