Daniel Johnson (CERN): Central Exclusive Production at LHCb

lundi 27 juin 2016, 14:00 → 15:00 Europe/Paris

Amphi Georges Charpak (LPNHE)

Central Exclusive Production (CEP) occurs at the LHC as an elastic, diffractive interaction between two colliding protons and provides a unique arena in which study exotic spectroscopy and to constrain the gluon PDF at low Bjorken x, where it is least well known. The absence of a hard-scatter, and of the consequent proton dissociation, gives rise to a striking experimental signature and an unusually clean analysis environment. The advent of data from the LHCb experiment at CERN has provided a golden opportunity for CEP studies; the richness of the dataset arising from the low LHCb pile-up, excellent particle identification and the very forward detector geometry. Following initial studies of CEP in Run 1 (2010-2013), a new LHCb sub-detector apparatus was installed ahead of Run 2, providing a powerful means to challenge the principal limitation of LHCb Run 1 CEP analyses. I will describe the progress made in analysis of Run 1 CEP at LHCb, the installation of a new detector during LS1, and its impact on the study of CEP at LHCb as Run 2 data arrive.

Lien SEMPARIS http://semparis.lpthe.jussieu.fr/list?type=seminars&key=10985&language=

Transparents 16-06Jun-27_DanJohnson.pdf