Název:	First determination of the ρ parameterat at √s = 13 TeV: probing the existence of a colourless C-odd three-gluon compound state
Autoři:	Antchev, G. Aspell, P. Atanassov, I. Avati, V. Baechler, J. Barrera, C. Baldenegro Berardi, V. Berretti, M. Bossini, E. Bottigli, U. Bozzo, M. Bruce, R. Burkhardt, H. Cafagna, F.S. Catanesi, M.G. Csanád, M. Csörgö, T. Deile, M. De Leonardis, F. D´Orazio, A. Doubek, Martin Druzhkin, D. Eggert, K. Eremin, V. Ferro, F. Fiergolski, A. Garcia, F. Garcia Morales, H. Georgiev, Vjačeslav Giani, S. Grzanka, L. Hammerbauer, Jiří Heino, J. Helander, P. Isidori, T. Ivanchenko, V. Janda, Martin Karev, A. Kašpar, Jiří Kopal, J. Kundrát, Vojtěch Lami, S. Latino, G. Lauhakangas, R. Linhart, Richard Lindsey, C. Lokajíček, Miloš Losurdo, L. Lo Vetere, M. Rodríguez, F. Lucas Macrí, M. Malawski, M. Mereghetti, A. Minafra, N. Minutoli, S. Mirarchi, D. Naarranoja, T. Nemes, F. Niewiadomski, H. Novak, T. Oliveri, E. Oljemark, F. Oriunno, M. Österberg, K. Palazzi, P. Passaro, V. Peroutka, Zdeněk Procházka, Jiří Quinto, M. Radermacher, E. Radicioni, E. Ravotti, F. Redaelli, S. Robutti, E. Royon, C. Ruggiero, G. Saarikko, H. Salvachua, B. Scribano, A. Široký, Jan Smajek, J. Snoeys, W. Stefanovitch, R. Sziklai, J. Taylor, C. Tcherniaev, E. Turini, N. Vacek, Václav Valentino, G. Welti, J. Wenninger, J. Williams, J. Wyszkowski, P. Zich, Jan Zielinski, K.
Citace zdrojového dokumentu:	ANTCHEV, G. ASPELL, P. ATANASSOV, I. AVATI, V. BAECHLER, J. BARRERA, CB. BERARDI, V. BERRETTI, M. BOSSINI, E. BOTTIGLI, U. BOZZO, M. BRUCE, R. BURKHARDT, H. CAFAGNA, F. CATANESI, M. CSANÁD, M. CSÖRGÖ, T. DEILE, M. DE LEONARDIS, F. D´ORAZIO, A. DOUBEK, M. DRUZHKIN, D. EGGERT, K. EREMIN, V. FERRO, F. FIERGOLSKI, A. GARCIA, F. GARCIA MORALES, H. GEORGIEV, V. GIANI, S. GRZANKA, L. HAMMERBAUER, J. HEINO, J. HELANDER, P. ISIDORI, T. IVANCHENKO, V. JANDA, M. KAREV, A. KAŠPAR, J. KOPAL, J. KUNDRÁT, V. LAMI, S. LATINO, G. LAUHAKANGAS, R. LINHART, R. LINDSEY, C. LOKAJÍČEK, M. LOSURDO, L. LO VETERE, M. RODRÍGUEZ, FL. MACRÍ, M. MALAWSKI, M. MEREGHETTI, A. MINAFRA, N. MINUTOLI, S. MIRARCHI, D. NAARRANOJA, T. NEMES, F. NIEWIADOMSKI, H. NOVAK, 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. REDAELLI, S. ROBUTTI, E. ROYON, C. RUGGIERO, G. SAARIKKO, H. SALVACHUA, B. SCRIBANO, A. ŠIROKÝ, J. SMAJEK, J. SNOEYS, W. STEFANOVITCH, R. SZIKLAI, J. TAYLOR, C. TCHERNIAEV, E. TURINI, N. VACEK, V. VALENTINO, G. WELTI, J. WENNINGER, J. WILLIAMS, J. WYSZKOWSKI, P. ZICH, ZIELINSKI, K. First determination of the ρ parameterat at √s = 13 TeV: probing the existence of a colourless C-odd three-gluon compound state. EUROPEAN PHYSICAL JOURNAL C, 2019, roč. 79, č. 9, s. 1-26. ISSN: 1434-6044
Datum vydání:	2019
Nakladatel:	Springer
Typ dokumentu:	článek article
URI:	2-s2.0-85073212646 http://hdl.handle.net/11025/47061
ISSN:	1434-6044
Klíčová slova v dalším jazyce:	elastic-scattering amplitude;regge singularities;perturbative qcd;totem experiment;odderon;interference;behavior;real
Abstrakt v dalším jazyce:	The TOTEM experiment at the LHC has performed the first measurement at √s = 13 TeV of the ρ parameter, the real to imaginary ratio of the nuclear elastic scattering amplitude at t = 0, obtaining the following results: ρ = 0.09 ± 0.01 and ρ = 0.10 ± 0.01, depending on different physics assumptions and mathematical modelling. The unprecedented precision of the ρ measurement, combined with the TOTEM total cross-section measurements in an energy range larger than 10 TeV (from 2.76 to 13 TeV) has implied the exclusion of all the models classified and published by COMPETE. The ρ results obtained by TOTEM are compatible with the predictions, from other theoretical models both in the Regge-like framework and in the QCD framework, of a crossing-odd colourless 3-gluon compound state exchange in the t-channel of the proton-proton elastic scattering. On the contrary, if shown that the crossing-odd 3-gluon compound state t-channel exchange is not of importance for the description of elastic scattering, the ρ value determined by TOTEM would represent a first evidence of a slowing down of the total cross-section growth at higher energies. The very low-|t| reach allowed also to determine the absolute normalisation using the Coulomb amplitude for the first time at the LHC and obtain a new total proton-proton cross-section measurement σtot = (110.3 ± 3.5) mb, completely independent from the previous TOTEM determination. Combining the two TOTEM results yields σtot = (110.5 ± 2.4) mb.
Práva:	© CERN for the benefit of the TOTEM collaboration
Vyskytuje se v kolekcích:	Články / Articles (KAE) Články / Articles (KEV) Články / Articles (KEI) Články / Articles (RICE) OBD

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