This Letter presents a search for a hidden-beauty counterpart of the X(3872) in the mass ranges of 10.05-10.31 GeV and 10.40-11.00 GeV, in the channel Xb→π+π-ϒhooked(1S)(→μ+μ-), using 16.2 fb-1 of s=8 TeV pp collision data collected by the ATLAS detector at the LHC. No evidence for new narrow states is found, and upper limits are set on the product of the Xb cross section and branching fraction, relative to those of the ϒhooked(2S), at the 95\% confidence level using the CLS approach. These limits range from 0.8\% to 4.0\%, depending on mass. For masses above 10.1 GeV, the expected upper limits from this analysis are the most restrictive to date. Searches for production of the ϒhooked(13DJ), ϒhooked(10860), and ϒhooked(11020) states also reveal no significant signals. \copyright 2014 The Authors.
Search for the Xb and other hidden-beauty states in the π+π-ϒ(1S) channel at ATLAS / Aad, G; Aloisio, Alberto; Alviggi, Mariagrazia; Canale, Vincenzo; Chiefari, Giovanni; DELLA PIETRA, Massimo; DELLA VOLPE, Domenico; Merola, Leonardo; Patricelli, Sergio; Conventi, Francesco; Rossi, Elvira; Perrella, Sabrina; SANCHEZ PINEDA, ARTURO RODOLFO; Carlino, Gianpaolo; DE ASMUNDIS, Riccardo; DI DONATO, Camilla; Doria, Alessandra; Iengo, Paolo; Izzo, Vincenzo; Sekhniaidze, Givi; Giordano, Raffaele; Et, A. l.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 740:(2015), pp. 199-217. [10.1016/j.physletb.2014.11.055]
Search for the Xb and other hidden-beauty states in the π+π-ϒ(1S) channel at ATLAS
ALOISIO, ALBERTO;ALVIGGI, MARIAGRAZIA;CANALE, VINCENZO;CHIEFARI, GIOVANNI;DELLA PIETRA, MASSIMO;DELLA VOLPE, DOMENICO;MEROLA, LEONARDO;PATRICELLI, SERGIO;CONVENTI, FRANCESCO;ROSSI, ELVIRA;PERRELLA, SABRINA;SANCHEZ PINEDA, ARTURO RODOLFO;CARLINO, GIANPAOLO;DE ASMUNDIS, Riccardo;DI DONATO, CAMILLA;IENGO, PAOLO;IZZO, VINCENZO;GIORDANO, RAFFAELE;
2015
Abstract
This Letter presents a search for a hidden-beauty counterpart of the X(3872) in the mass ranges of 10.05-10.31 GeV and 10.40-11.00 GeV, in the channel Xb→π+π-ϒhooked(1S)(→μ+μ-), using 16.2 fb-1 of s=8 TeV pp collision data collected by the ATLAS detector at the LHC. No evidence for new narrow states is found, and upper limits are set on the product of the Xb cross section and branching fraction, relative to those of the ϒhooked(2S), at the 95\% confidence level using the CLS approach. These limits range from 0.8\% to 4.0\%, depending on mass. For masses above 10.1 GeV, the expected upper limits from this analysis are the most restrictive to date. Searches for production of the ϒhooked(13DJ), ϒhooked(10860), and ϒhooked(11020) states also reveal no significant signals. \copyright 2014 The Authors.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
