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Elastic differential cross-section measurement at 𝑠√=13 TeV by TOTEM
Antchev, G. Royon, Christophe TOTEM collaboration
Antchev, G.
Royon, Christophe
TOTEM collaboration
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Abstract
The TOTEM collaboration has measured the elastic proton-proton differential cross section d𝜎/d𝑡 at 𝑠√=13 TeV LHC energy using dedicated 𝛽∗=90 m beam optics. The Roman Pot detectors were inserted to 10𝜎 distance from the LHC beam, which allowed the measurement of the range [0.04 GeV2; 4 GeV2 ] in four-momentum transfer squared |t|. The efficient data acquisition allowed to collect about 109 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±0.002stat±0.01syst) GeV−2 in the |t|-range 0.04–0.2 GeV2. The dip position is |𝑡dip|=(0.47±0.004stat±0.01syst) GeV2. The differential cross section ratio at the bump vs. at the dip 𝑅=1.77±0.01stat 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.
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This work is licensed under a Creative Commons Attribution 4.0 International License.
Date
2019-10-19
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SpringerOpen
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Antchev_2019.pdf
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Antchev, G., Aspell, P., Atanassov, I. et al. Elastic differential cross-section measurement at 𝑠√=13 TeV by TOTEM. Eur. Phys. J. C 79, 861 (2019). https://doi.org/10.1140/epjc/s10052-019-7346-7