Elastic differential cross-section measurement at $\sqrt{s}=13$ TeV by TOTEM - INSPIRE

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Elastic differential cross-section measurement at $\sqrt{s}=13$ TeV by TOTEM

TOTEM

Collaboration

•

G. Antchev
(
- Sofiya, Inst. Nucl. Res.
)

Dec 19, 2018

20 pages

Published in:

Eur.Phys.J.C 79 (2019) 10, 861

Published: Oct 19, 2019

e-Print:

1812.08283 [hep-ex]

DOI:

10.1140/epjc/s10052-019-7346-7

Report number:

CERN-EP-2018-338,
TOTEM-2018-003

Experiments:

CERN-LHC-TOTEM

View in:

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Abstract: (Springer)

The TOTEM collaboration has measured the elastic proton-proton differential cross section

\mathrm{d}\sigma /\mathrm{d}t

at

\sqrt{s}=13

TeV LHC energy using dedicated

\beta ^{*}=90

m beam optics. The Roman Pot detectors were inserted to 10

\sigma

distance from the LHC beam, which allowed the measurement of the range [0.04 GeV

^{2}

, 4 GeV

^{2}

]

in four-momentum transfer squared |t|. The efficient data acquisition allowed to collect about 10

^{9}

elastic events to precisely measure the differential cross-section including the diffractive minimum (dip), the subsequent maximum (bump) and the large-|t| tail. The average nuclear slope has been found to be

B=(20.40 \pm 0.002^{\mathrm{stat}} \pm 0.01^{\mathrm{syst}})~

GeV

^{-2}

in the |t|-range 0.04–0.2 GeV

^{2}

. The dip position is

|t_{\mathrm{dip}}|=(0.47 \pm 0.004^{\mathrm{stat}} \pm 0.01^{\mathrm{syst}})~

GeV

^{2}

. The differential cross section ratio at the bump vs. at the dip

R=1.77\pm 0.01^{\mathrm{stat}}

has been measured with high precision. The series of TOTEM elastic pp measurements show that the dip is a permanent feature of the pp differential cross-section at the TeV scale.

Note:

76 authors, 20 pages, 11 figures, 5 tables

p p: elastic scattering
p p: colliding beams
differential cross section: ratio
elastic scattering: differential cross section
differential cross section: measured
scale: TeV
dip
TOTEM
CERN LHC Coll
angular distribution

References(20)

Figures(13)

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