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Measurement of the total cross section and ρ -parameter from elastic scattering in pp collisions at √s=13 TeV with the ATLAS detector

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Measurement of the total cross section and ρ -parameter from elastic scattering in pp collisions at √s=13 TeV with the ATLAS detector. / ATLAS Collaboration ; Barton, Adam; Bertram, Iain et al.
In: European Physical Journal C, Vol. 83, No. 5, 441, 26.05.2023.

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@article{72664bd945e8441b9de51f54d9e19ab1,
title = "Measurement of the total cross section and ρ -parameter from elastic scattering in pp collisions at √s=13 TeV with the ATLAS detector",
abstract = "In a special run of the LHC with β⋆=2.5 km, proton–proton elastic-scattering events were recorded at s√=13 TeV with an integrated luminosity of 340 μb−1 using the ALFA subdetector of ATLAS in 2016. The elastic cross section was measured differentially in the Mandelstam t variable in the range from −t=2.5⋅10−4 GeV2 to −t=0.46 GeV2 using 6.9 million elastic-scattering candidates. This paper presents measurements of the total cross section σtot, parameters of the nuclear slope, and the ρ-parameter defined as the ratio of the real part to the imaginary part of the elastic-scattering amplitude in the limit t→0. These parameters are determined from a fit to the differential elastic cross section using the optical theorem and different parameterizations of the t-dependence. The results for σtot and ρ areσtot(pp→X)=104.7±1.1 mb ,ρ=0.098±0.011.The uncertainty in σtot is dominated by the luminosity measurement, and in ρ by imperfect knowledge of the detector alignment and by modelling of the nuclear amplitude.",
author = "{ATLAS Collaboration} and Adam Barton and Iain Bertram and Guennadi Borissov and Evelina Bouhova-Thacker and Harald Fox and Robert Henderson and Jones, {Roger William Lewis} and Vakhtang Kartvelishvili and Peter Love and Lingxin Meng and Daniel Muenstermann and Katherine Rybacki and Maria Smizanska and Sebastiano Spinali and Andrew Wharton and Melissa Yexley",
year = "2023",
month = may,
day = "26",
doi = "10.1140/epjc/s10052-023-11436-8",
language = "English",
volume = "83",
journal = "European Physical Journal C",
number = "5",

}

RIS

TY - JOUR

T1 - Measurement of the total cross section and ρ -parameter from elastic scattering in pp collisions at √s=13 TeV with the ATLAS detector

AU - ATLAS Collaboration

AU - Barton, Adam

AU - Bertram, Iain

AU - Borissov, Guennadi

AU - Bouhova-Thacker, Evelina

AU - Fox, Harald

AU - Henderson, Robert

AU - Jones, Roger William Lewis

AU - Kartvelishvili, Vakhtang

AU - Love, Peter

AU - Meng, Lingxin

AU - Muenstermann, Daniel

AU - Rybacki, Katherine

AU - Smizanska, Maria

AU - Spinali, Sebastiano

AU - Wharton, Andrew

AU - Yexley, Melissa

PY - 2023/5/26

Y1 - 2023/5/26

N2 - In a special run of the LHC with β⋆=2.5 km, proton–proton elastic-scattering events were recorded at s√=13 TeV with an integrated luminosity of 340 μb−1 using the ALFA subdetector of ATLAS in 2016. The elastic cross section was measured differentially in the Mandelstam t variable in the range from −t=2.5⋅10−4 GeV2 to −t=0.46 GeV2 using 6.9 million elastic-scattering candidates. This paper presents measurements of the total cross section σtot, parameters of the nuclear slope, and the ρ-parameter defined as the ratio of the real part to the imaginary part of the elastic-scattering amplitude in the limit t→0. These parameters are determined from a fit to the differential elastic cross section using the optical theorem and different parameterizations of the t-dependence. The results for σtot and ρ areσtot(pp→X)=104.7±1.1 mb ,ρ=0.098±0.011.The uncertainty in σtot is dominated by the luminosity measurement, and in ρ by imperfect knowledge of the detector alignment and by modelling of the nuclear amplitude.

AB - In a special run of the LHC with β⋆=2.5 km, proton–proton elastic-scattering events were recorded at s√=13 TeV with an integrated luminosity of 340 μb−1 using the ALFA subdetector of ATLAS in 2016. The elastic cross section was measured differentially in the Mandelstam t variable in the range from −t=2.5⋅10−4 GeV2 to −t=0.46 GeV2 using 6.9 million elastic-scattering candidates. This paper presents measurements of the total cross section σtot, parameters of the nuclear slope, and the ρ-parameter defined as the ratio of the real part to the imaginary part of the elastic-scattering amplitude in the limit t→0. These parameters are determined from a fit to the differential elastic cross section using the optical theorem and different parameterizations of the t-dependence. The results for σtot and ρ areσtot(pp→X)=104.7±1.1 mb ,ρ=0.098±0.011.The uncertainty in σtot is dominated by the luminosity measurement, and in ρ by imperfect knowledge of the detector alignment and by modelling of the nuclear amplitude.

U2 - 10.1140/epjc/s10052-023-11436-8

DO - 10.1140/epjc/s10052-023-11436-8

M3 - Journal article

VL - 83

JO - European Physical Journal C

JF - European Physical Journal C

IS - 5

M1 - 441

ER -