The
CMS
&
TOTEM
collaborations
Chatrchyan, Serguei
;
Khachatryan, Vardan
;
Sirunyan, Albert M
;
*et al. *

Eur.Phys.J.C 74 (2014) 3053, 2014.

https://inspirehep.net/literature/1294140
Inspire Record
1294140
DOI
10.17182/hepdata.66893
https://doi.org/10.17182/hepdata.66893
Pseudorapidity (eta) distributions of charged particles produced in proton-proton collisions at a centre-of-mass energy of 8 TeV are measured in the ranges abs(eta) < 2.2 and 5.3 < abs(eta) < 6.4 covered by the CMS and TOTEM detectors, respectively. The data correspond to an integrated luminosity of 45 inverse microbarns. Measurements are presented for three event categories. The most inclusive category is sensitive to 91-96% of the total inelastic proton-proton cross section. The other two categories are disjoint subsets of the inclusive sample that are either enhanced or depleted in single diffractive dissociation events. The data are compared to models used to describe high-energy hadronic interactions. None of the models considered provide a consistent description of the measured distributions.

3
data tables

Charged particle multiplicity (Inclusive) -- syst -- BB: bin-by-bin uncertainty.

The
TOTEM
collaboration
Antchev, G.
;
Aspell, P.
;
Atanassov, I.
;
*et al. *

EPL 101 (2013) 21002, 2013.

https://inspirehep.net/literature/1220862
Inspire Record
1220862
DOI
10.17182/hepdata.66456
https://doi.org/10.17182/hepdata.66456
At the LHC energy of $\sqrt s = 7\,{\mathrm { TeV}}$ , under various beam and background conditions, luminosities, and Roman Pot positions, TOTEM has measured the differential cross-section for proton-proton elastic scattering as a function of the four-momentum transfer squared t. The results of the different analyses are in excellent agreement demonstrating no sizeable dependence on the beam conditions. Due to the very close approach of the Roman Pot detectors to the beam center (≈5σ(beam)) in a dedicated run with β* = 90 m, |t|-values down to 5·10(−)(3) GeV(2) were reached. The exponential slope of the differential elastic cross-section in this newly explored |t|-region remained unchanged and thus an exponential fit with only one constant B = (19.9 ± 0.3) GeV(−)(2) over the large |t|-range from 0.005 to 0.2 GeV(2) describes the differential distribution well. The high precision of the measurement and the large fit range lead to an error on the slope parameter B which is remarkably small compared to previous experiments. It allows a precise extrapolation over the non-visible cross-section (only 9%) to t = 0. With the luminosity from CMS, the elastic cross-section was determined to be (25.4 ± 1.1) mb, and using in addition the optical theorem, the total pp cross-section was derived to be (98.6 ± 2.2) mb. For model comparisons the t-distributions are tabulated including the large |t|-range of the previous measurement (TOTEM Collaboration (Antchev G. et al), EPL, 95 (2011) 41001).

5
data tables

The measured differential elastic cross section.

The fitted slope parameter for the elastic cross section fitted over 4 |T| ranges.