Volume 297 - XXV International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2017) - WG2 Low x and Diffraction
Very forward inclusive jet cross sections in p+Pb collisions at √ s NN = 5.02 TeV at CMS
M.H.F. Van De Klundert* on behalf of the CMS collaboration
*corresponding author
Full text: pdf
Pre-published on: 2017 September 18
Published on: 2018 January 11
Abstract
Very forward inclusive jet energy spectra were measured with the CMS experiment at the LHC in proton-lead collisions, with a centre-of-mass energy of $\sqrt{s_{\mathrm{NN}}}=5.02\,\mathrm{TeV}$. The measurement was performed using the CASTOR calorimeter, which measures in the pseudorapidity range $-6.6<\eta<-5.2$. The spectra, with the proton (p+Pb) or ion (Pb+p) towards CASTOR, are unfolded to the particle level and compared to predictions of various event generators. The p+Pb/Pb+p ratio of the spectra is also presented, for which the systematic uncertainties in the measurement are significantly reduced.
The event generators considered in this analysis are not able to describe any of the spectra in their full energy range. Deviations between data and the models in excess of two orders of magnitude are observed.
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