On the origin of forward–backward multiplicity correlations in pp collisions at ultra relativistic energiesстатьяИсследовательская статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 5 января 2019 г.
Аннотация:We study multiplicity correlations of hadrons in forward and backward hemispheres in pp inelastic
interactions at energies 200 GeV ≤ √s ≤ 13 TeV within the microscopic quark–gluon string model. The
model correctly describes (i) the almost linear dependence of average multiplicity in one hemisphere on
the particle multiplicity in other hemisphere in the centre-of-mass frame; (ii) the increase of the slope
parameter b_corr with rising collision energy; (iii) the quick falloff of the correlation strength with increase
of the midrapidity gap; (iv) saturation of the forward–backward correlations at very high multiplicities.
Investigation of the sub-processes on partonic level reveals that these features can be attributed to short-
range partonic correlations within a single string and superposition of several sub-processes containing
different numbers of soft and hard Pomerons with different mean multiplicities. If the number of
Pomerons in the event is fixed, no forward–backward correlations are observed. Predictions are made
for the top LHC energy √s = 13 TeV.