The TOTEM experiment has made a precise measurement of the elastic proton proton differential cross-section at the centre-of-mass energy root s = 8 TeV based on a high-statistics data sample obtained with the beta* = 90 m optics. Both the statistical and systematic uncertainties remain below 1%, except for the t-independent contribution from the overall normalisation. This unprecedented precision allows to exclude a purely exponential differential cross-section in the range of four-momentum transfer squared 0.027 < vertical bar t vertical bar < 0.2 GeV2 with a significance greater than 7 sigma. Two extended parametrisations, with quadratic and cubic polynomials in the exponent, are shown to be well compatible with the data. Using them for the differential cross-section extrapolation to t = 0, and further applying the optical theorem, yields total cross-section estimates of (101.5 +/- 2.1) mb and (101.9 +/- 2.1) mb, respectively, in agreement with previous TOTEM measurements.

Evidence for non-exponential elastic proton–proton differential cross-section at low |t|and √s=8 TeVbyTOTEM / G., Antchev; P., Aspell; I., Atanassov; V., Avati; J., Baechler; Berardi, Vincenzo; M., Berretti; E., Bossini; U., Bottigli; M., Bozzom; P., Broulím; A., Buzzom; F. S., Cafagna; C. E., Campanella; M. G., Catanesi; M., Csanád; T., Csörgo; M., Deile; DE LEONARDIS, Francesco; D'Orazio, Antonella; M., Doubek; K., Eggert; V., Eremin; F., Ferro; A., Fiergolski; F., Garcia; V., Georgiev; S., Giani; L., Grzanka; Guaragnella, Cataldo; J., Hammerbauer; J., Heino; A., Karev; J., Kašpar; J., Kopal; V., Kundrát; S., Lami; G., Latino; R., Lauhakangas; R., Linhart; E., Lippmaa; J., Lippmaa; M. V., Lokajícek; L., Losurdo; M., Lovetere; F., Lucas Rodríguez; M., Macrí; A., Mercadante; N., Minafra; S., Minutoli; T., Naaranoja; F., Nemes; H., Niewiadomski; E., Oliveri; F., Oljemark; R., Orava; M., Oriunno; K., Österberg; P., Palazzi; L., Palocko; Passaro, Vittorio; Z., Peroutka; Petruzzelli, Vincenzo; Politi, Tiziano; J., Procházka; Prudenzano, Francesco; M., Quinto; E., Radermacher; E., Radicioni; F., Ravotti; E., Robutti; L., Ropelewski; G., Ruggiero; H., Saarikko; A., Scribano; J., Smajek; W., Snoeys; T., Sodzawiczny; J., Sziklai; C., Taylor; N., Turini; V., Vacek; J., Welti; P., Wyszkowski; K., Zielinski. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - STAMPA. - 899:(2015), pp. 527-546. [10.1016/j.nuclphysb.2015.08.010]

Evidence for non-exponential elastic proton–proton differential cross-section at low |t|and √s=8 TeVbyTOTEM

BERARDI, Vincenzo;DE LEONARDIS, Francesco;D'ORAZIO, Antonella;GUARAGNELLA, Cataldo;PASSARO, Vittorio;PETRUZZELLI, Vincenzo;Politi, Tiziano;PRUDENZANO, Francesco;
2015-01-01

Abstract

The TOTEM experiment has made a precise measurement of the elastic proton proton differential cross-section at the centre-of-mass energy root s = 8 TeV based on a high-statistics data sample obtained with the beta* = 90 m optics. Both the statistical and systematic uncertainties remain below 1%, except for the t-independent contribution from the overall normalisation. This unprecedented precision allows to exclude a purely exponential differential cross-section in the range of four-momentum transfer squared 0.027 < vertical bar t vertical bar < 0.2 GeV2 with a significance greater than 7 sigma. Two extended parametrisations, with quadratic and cubic polynomials in the exponent, are shown to be well compatible with the data. Using them for the differential cross-section extrapolation to t = 0, and further applying the optical theorem, yields total cross-section estimates of (101.5 +/- 2.1) mb and (101.9 +/- 2.1) mb, respectively, in agreement with previous TOTEM measurements.
2015
Evidence for non-exponential elastic proton–proton differential cross-section at low |t|and √s=8 TeVbyTOTEM / G., Antchev; P., Aspell; I., Atanassov; V., Avati; J., Baechler; Berardi, Vincenzo; M., Berretti; E., Bossini; U., Bottigli; M., Bozzom; P., Broulím; A., Buzzom; F. S., Cafagna; C. E., Campanella; M. G., Catanesi; M., Csanád; T., Csörgo; M., Deile; DE LEONARDIS, Francesco; D'Orazio, Antonella; M., Doubek; K., Eggert; V., Eremin; F., Ferro; A., Fiergolski; F., Garcia; V., Georgiev; S., Giani; L., Grzanka; Guaragnella, Cataldo; J., Hammerbauer; J., Heino; A., Karev; J., Kašpar; J., Kopal; V., Kundrát; S., Lami; G., Latino; R., Lauhakangas; R., Linhart; E., Lippmaa; J., Lippmaa; M. V., Lokajícek; L., Losurdo; M., Lovetere; F., Lucas Rodríguez; M., Macrí; A., Mercadante; N., Minafra; S., Minutoli; T., Naaranoja; F., Nemes; H., Niewiadomski; E., Oliveri; F., Oljemark; R., Orava; M., Oriunno; K., Österberg; P., Palazzi; L., Palocko; Passaro, Vittorio; Z., Peroutka; Petruzzelli, Vincenzo; Politi, Tiziano; J., Procházka; Prudenzano, Francesco; M., Quinto; E., Radermacher; E., Radicioni; F., Ravotti; E., Robutti; L., Ropelewski; G., Ruggiero; H., Saarikko; A., Scribano; J., Smajek; W., Snoeys; T., Sodzawiczny; J., Sziklai; C., Taylor; N., Turini; V., Vacek; J., Welti; P., Wyszkowski; K., Zielinski. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - STAMPA. - 899:(2015), pp. 527-546. [10.1016/j.nuclphysb.2015.08.010]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/670
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