The TOTEM experiment has measured the charged-particle pseudorapidity density dN ch/dη in pp collisions at for 5.3<|η|<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 η region. The measurement refers to more than 99% of non-diffractive processes and to single and double diffractive processes with diffractive masses above ∼3.4 GeV/c 2, corresponding to about 95% of the total inelastic cross-section. The dN ch/dη has been found to decrease with |η|, from 3.84 ± 0.01(stat) ± 0.37(syst) at |η|=5.375 to 2.38±0.01(stat)±0.21(syst) at |η|=6.375. Several MC generators have been compared to data; none of them has been found to fully describe the measurement.
|Titolo:||Measurement of the forward charged-particle pseudorapidity density in pp collisions at √s = 7 TeV with the TOTEM experiment|
|Data di pubblicazione:||2012|
|Digital Object Identifier (DOI):||10.1209/0295-5075/98/31002|
|Appare nelle tipologie:||1.1 Articolo in rivista|