Measurement of the inelastic proton-proton cross section at $\sqrt{s}=13~\mathrm{TeV}$

Measurement of the inelastic proton-proton cross section at $\sqrt{s}=13~\mathrm{TeV}$

CMS

Collaboration

2016

12 pages

Report number:

CMS-PAS-FSQ-15-005

Experiments:

CERN-LHC-CMS

View in:

CERN Document Server

pdf

reference search33 citations

Citations per year

Abstract:

A measurement of the inelastic cross section for proton-proton collisions at a centre-of-mass energy of

\sqrt{s} = 13~\mathrm{TeV}

is presented. The analysis is performed with the CMS detector based on information from forward calorimetry, at pseudorapidity

3.0 < \eta < 5.2

and

-6.6 < \eta < -3.0

, and thus covers particle production over more than 11 units of pseudorapidity and down to small transverse momenta. A visible cross section of

66.9 \pm 0.4~\mathrm{(exp.)} \pm 2.0~\mathrm{(lum.)}~\mathrm{mb}

is obtained for

M_\mathrm{X} > 4.1~\mathrm{GeV}

and

M_\mathrm{Y} > 13~\mathrm{GeV}

, where

M_\mathrm{X}

and

M_\mathrm{Y}

are the masses of the diffractive dissociation systems moving towards negative and positive pseudorapidity, respectively. The visible cross section is extrapolated to the full inelastic phase space domain, yielding

71.3 \pm 0.5~\mathrm{(exp.)} \pm 2.1~\mathrm{(lum.)} \pm 2.7~\mathrm{(ext.)}~\mathrm{mb}

. The results are compared with those of other experiments, and with models used to describe high-energy hadronic interactions.

Note:

Preliminary results

Data
p p: inelastic scattering
p p: colliding beams
diffraction: dissociation
rapidity: gap
rapidity dependence
transverse momentum dependence
calorimeter: forward spectrometer
phase space
channel cross section: measured

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Measurement of the inelastic proton-proton cross section at s=13 TeV\sqrt{s}=13~\mathrm{TeV}s​=13 TeV

Citations per year

Measurement of the inelastic proton-proton cross section at $\sqrt{s}=13~\mathrm{TeV}$