Measurement of the forward charged particle pseudorapidity density in pp collisions at sqrt(s) = 8 TeV using a displaced interaction point

0456670 - FZÚ 2016 RIV DE eng J - Journal Article
Antchev, G. - Aspell, P. - Atanassov, I. - Kašpar, Jan - Kopal, Josef - Kundrát, Vojtěch - Lokajíček, Miloš V. - Procházka, Jiří … Total 79 authors
Measurement of the forward charged particle pseudorapidity density in pp collisions at sqrt(s) = 8 TeV using a displaced interaction point.
European Physical Journal C. Roč. 75, č. 3 (2015), s. 126. ISSN 1434-6044. E-ISSN 1434-6052
R&D Projects: GA MŠMT(CZ) LG13031
Institutional support: RVO:68378271
Keywords : pseudorapidity of charged particles * forward scattering
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 4.912, year: 2015

The pseudorapidity density of charged particles dN(ch)/d η is measured by the TOTEM experiment in pp collisions at sqrt(s) = 8 TeV within the range 3.9 < η < 4.7 and -6.95 < η < -6.9. Data were collected in a low intensity LHC run with collisions occurring at a distance of 11.25 m from the nominal interaction point. The data sample is expected to include 96-97\% of the inelastic proton-proton interactions. The measurement reported here considers charged particles with p_T > 0 MeV/c, produced in inelastic interactions with at least one charged particle in -7 < η < -6 or 3.7 < η <4.8 . The dN(ch)/d η has been found to decrease with |η|, from 5.11 +- 0.73 at η = 3.95 to 1.81 +- 0.56 at η=-6.925. Several MC generators are compared to the data and are found to be within the systematic uncertainty of the measurement.

Permanent Link: http://hdl.handle.net/11104/0257163