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https://hdl.handle.net/10316/106307
Título: | Measurement of differential cross sections for single diffractive dissociation in √s = 8 TeV pp collisions using the ATLAS ALFA spectrometer | Autor: | Fiolhais, M. C. N. Veloso, F. Wolters, H. ATLAS Collaboration |
Palavras-chave: | Diffraction; Forward physics; Hadron-Hadron scattering (experiments); QCD | Data: | 2020 | Editora: | Springer Nature | Título da revista, periódico, livro ou evento: | Journal of High Energy Physics | Volume: | 2020 | Número: | 2 | Resumo: | A dedicated sample of Large Hadron Collider proton-proton collision data at centre-of-mass energy s = 8 TeV is used to study inclusive single diffractive dissociation, pp → X p. The intact final-state proton is reconstructed in the ATLAS ALFA forward spectrometer, while charged particles from the dissociated system X are measured in the central detector components. The fiducial range of the measurement is −4.0 < log10ξ < −1.6 and 0.016 < |t| < 0.43 GeV2, where ξ is the proton fractional energy loss and t is the squared four-momentum transfer. The total cross section integrated across the fiducial range is 1.59 ± 0.13 mb. Cross sections are also measured differentially as functions of ξ, t, and ∆η, a variable that characterises the rapidity gap separating the proton and the system X. The data are consistent with an exponential t dependence, dσ/dt ∝ eBt with slope parameter B = 7.65 ± 0.34 GeV−2. Interpreted in the framework of triple Regge phenomenology, the ξ dependence leads to a pomeron intercept of α(0) = 1.07 ± 0.09. | URI: | https://hdl.handle.net/10316/106307 | DOI: | 10.1007/JHEP02(2020)042 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Física - Artigos em Revistas Internacionais |
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Measurement-of-differential-cross-sections-for-single-diffractive-dissociation-in-s--8-TeV-pp-collisions-using-the-ATLAS-ALFA-spectrometerJournal-of-High-Energy-Physics.pdf | 676.58 kB | Adobe PDF | Ver/Abrir |
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