Электронный каталог

Статья

Aad, G.
Measurement of the Total Cross Section and *r-Parameter from Elastic Scattering in pp Collisions at *%s = 13 TeV with the ATLAS Detector / G.Aad, F.Ahmadov, I.N.Aleksandrov, V.A.Bednyakov, I.R.Boyko, I.A.Budagov, G.A.Chelkov, A.Cheplakov, M.V.Chizhov, D.V.Dedovich, M.Demichev, A.Gongadze, M.I.Gostkin, N.Huseynov, S.N.Karpov, Z.M.Karpova, U.Kruchonak, Y.Kulchitsky, V.Kukhtin, E.Ladygin, V.Lyubushkin, T.Lyubushkina, S.Malyukov, M.Mineev, E.Plotnikova, I.N.Potrap, N.A.Rusakovich, M.Shiyakova, A.Soloshenko, S.Turchikhin, T.Turtuvshin, I.Yeletskikh, A.Zhemchugov, N.I.Zimine, [ATLAS Collab.] // The European Physical Journal C [Electronic resource]. – 2023. – Vol.83, No.5. – P. 441. – URL: https://doi.org/10.1140/epjc/s10052-023-11436-8. – Bibliogr.: 61.

In a special run of the LHC with *b&sp(* )= 2.5 km, proton–proton elastic-scattering events were recorded at *%s = 13 TeV with an integrated luminosity of *m 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 x 10*-*4 GeV*2 to -t = 0,46 GeV*2 using 6.9 million elastic-scattering candidates. This paper presents measurements of the total cross section , parameters of the nuclear slope, and the *p-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 *s&sub((tot) and *r are *s&sub(tot) (pp *> X) = 104,7 *( 1/1 mb, *r = 0,098 *( 0,011. The uncertainty in *s&sub(tot) is dominated by the luminosity measurement, and in *r by imperfect knowledge of the detector alignment and by modelling of the nuclear amplitude.



Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
Спец.(статьи,препринты) = С 323.5б - Упругое рассеяние частиц и эксклюзивные процессы
ОИЯИ = ОИЯИ (JINR)2023