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

• Published in: The European physical journal. C, Particles and fields Vol. 82; no. 3
• Main Authors: Antchev, G., Aspell, P., Atanassov, I., Avati, V., Baechler, J., Barrera, C. Baldenegro, Berardi, V., Berretti, M., Borchsh, V., Bossini, E., Bottigli, U., Bozzo, M., Burkhardt, H., Cafagna, F. S., Catanesi, M. G., Csanád, M., Csörgő, T., Deile, M., De Leonardis, F., Doubek, M., Druzhkin, D., Eggert, K., Eremin, V., Ferro, F., Fiergolski, A., Forthomme, L., Garcia, F., Georgiev, V., Giani, S., Grzanka, L., Hammerbauer, J., Isidori, T., Ivanchenko, V., Janda, M., Karev, A., Kašpar, J., Kaynak, B., Kopal, J., Kundrát, V., Lami, S., Latino, G., Linhart, R., Lindsey, C., Lokajíček, M. V., Losurdo, L., Rodríguez, F. Lucas, Macrí, M., Malawski, M., Minafra, N., Minutoli, S., Naaranoja, T., Nemes, F., Niewiadomski, H., Novák, T., Oliveri, E., Oljemark, F., Oriunno, M., Österberg, K., Palazzi, P., Passaro, V., Peroutka, Z., Procházka, J., Quinto, M., Radermacher, E., Radicioni, E., Ravotti, F., Robutti, E., Royon, C., Ruggiero, G., Saarikko, H., Samoylenko, V. D., Scribano, A., Siroky, J., Smajek, J., Snoeys, W., Stefanovitch, R., Sziklai, J., Taylor, C., Tcherniaev, E., Turini, N., Urban, O., Vacek, V., Vavroch, O., Welti, J., Williams, J., Zich, J., Zielinski, K.
• Format: Journal Article
• Language: English
• Published: United States Springer 26.03.2022
• Subjects: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
• 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.