Characterisation of the dip-bump structure observed in proton–proton elastic scattering at $$\sqrt{s}$$ s = 8 TeV

• Published in: The European physical journal. C, Particles and fields Vol. 82; no. 3; pp. 1 - 7
• Main Authors: G. Antchev, P. Aspell, I. Atanassov, V. Avati, J. Baechler, C. Baldenegro Barrera, V. Berardi, M. Berretti, V. Borchsh, E. Bossini, U. Bottigli, M. Bozzo, H. Burkhardt, F. S. Cafagna, M. G. Catanesi, M. Csanád, T. Csörgő, M. Deile, F. De Leonardis, M. Doubek, D. Druzhkin, K. Eggert, V. Eremin, F. Ferro, A. Fiergolski, L. Forthomme, F. Garcia, V. Georgiev, S. Giani, L. Grzanka, J. Hammerbauer, T. Isidori, V. Ivanchenko, M. Janda, A. Karev, J. Kašpar, B. Kaynak, J. Kopal, V. Kundrát, S. Lami, G. Latino, R. Linhart, C. Lindsey, M. V. Lokajíček, L. Losurdo, F. Lucas Rodríguez, M. Macrí, M. Malawski, N. Minafra, S. Minutoli, T. Naaranoja, F. Nemes, H. Niewiadomski, T. Novák, E. Oliveri, F. Oljemark, M. Oriunno, K. Österberg, P. Palazzi, V. Passaro, Z. Peroutka, J. Procházka, M. Quinto, E. Radermacher, E. Radicioni, F. Ravotti, E. Robutti, C. Royon, G. Ruggiero, H. Saarikko, V. D. Samoylenko, A. Scribano, J. Siroky, J. Smajek, W. Snoeys, R. Stefanovitch, J. Sziklai, C. Taylor, E. Tcherniaev, N. Turini, O. Urban, V. Vacek, O. Vavroch, J. Welti, J. Williams, J. Zich, K. Zielinski, TOTEM Collaboration
• Format: Journal Article
• Language: English
• Published: SpringerOpen 01.03.2022
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-022-10065-x

Abstract The TOTEM collaboration at the CERN LHC has measured the differential cross-section of elastic proton–proton scattering at $$\sqrt{s} = 8\,\mathrm{TeV}$$ s = 8 TeV in the squared four-momentum transfer range $$0.2\,\mathrm{GeV^{2}}< |t| < 1.9\,\mathrm{GeV^{2}}$$ 0.2 GeV 2 < | t | < 1.9 GeV 2 . This interval includes the structure with a diffractive minimum (“dip”) and a secondary maximum (“bump”) that has also been observed at all other LHC energies, where measurements were made. A detailed characterisation of this structure for $$\sqrt{s} = 8\,\mathrm{TeV}$$ s = 8 TeV yields the positions, $$|t|_{\mathrm{dip}} = (0.521 \pm 0.007)\,\mathrm{GeV^2}$$ | t | dip = ( 0.521 ± 0.007 ) GeV 2 and $$|t|_{\mathrm{bump}} = (0.695 \pm 0.026)\,\mathrm{GeV^2}$$ | t | bump = ( 0.695 ± 0.026 ) GeV 2 , as well as the cross-section values, $$\left. {\mathrm{d}\sigma /\mathrm{d}t}\right| _{\mathrm{dip}} = (15.1 \pm 2.5)\,\mathrm{{\mu b/GeV^2}}$$ d σ / d t dip = ( 15.1 ± 2.5 ) μ b / GeV 2 and $$\left. {\mathrm{d}\sigma /\mathrm{d}t}\right| _{\mathrm{bump}} = (29.7 \pm 1.8)\,\mathrm{{\mu b/GeV^2}}$$ d σ / d t bump = ( 29.7 ± 1.8 ) μ b / GeV 2 , for the dip and the bump, respectively.