Measurement of the forward charged particle pseudorapidity density in pp
collisions at sqrts = 7 TeV with the TOTEM experiment
release_x5r2gbhvuncolguowbesztegcq
by
G. Antchev, P. Aspell, I. Atanassov, V. Avati, J. Baechler, V.
Berardi, M. Berretti, E. Bossini, M. Bozzo, P. Brogi, E. Brücken, A. Buzzo,
F. S. Cafagna (+58 others)
2012
Abstract
The TOTEM experiment has measured the charged particle pseudorapidity density
dN_ch/deta in pp collisions at sqrts = 7 TeV for 5.3<|eta|<6.4 in events
with at least one charged particle with transverse momentum above 40 MeV/c in
this pseudorapidity range. This extends the analogous measurement performed by
the other LHC experiments to the previously unexplored forward eta region. The
measurement refers to more than 99
and double diffractive processes with diffractive masses above 3.4 GeV/c^2,
corresponding to about 95
dN_ch/deta has been found to decrease with |eta|, from 3.84 pm 0.01(stat) pm
0.37(syst) at |eta| = 5.375 to 2.38 pm 0.01(stat) pm 0.21(syst) at |eta| =
6.375. Several MC generators have been compared to data; none of them has been
found to fully describe the measurement.
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1205.4105v1
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