Search for the \(X_b\) and other hidden-beauty states in the \(π^+π^−ϒ\)(1S) channel at ATLAS

Please always quote using this URN: urn:nbn:de:bvb:20-opus-138273

  • 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 X\(_b\)→π\(^+\)π\(^−\)ϒ(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 X\(_b\) cross section and branching fraction, relative to those of the ϒ(2S), at the 95% confidence level using the CLSCLS approach. These limits range from 0.8%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 X\(_b\)→π\(^+\)π\(^−\)ϒ(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 X\(_b\) cross section and branching fraction, relative to those of the ϒ(2S), at the 95% confidence level using the CLSCLS 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 ϒ(1\(^3\)D\(_J\)), ϒ(10860), and ϒ(11020) states also reveal no significant signals.show moreshow less

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Metadaten
URN:urn:nbn:de:bvb:20-opus-138273
Document Type:Journal article
Faculties:Fakultät für Physik und Astronomie / Physikalisches Institut
Language:English
Parent Title (English):Physics Letters B
Year of Completion:2014
Volume:740
Pagenumber:199–217
Source:Physics Letters B 740 (2015) 199–217. doi:10.1016/j.physletb.2014.11.055
DOI:https://doi.org/10.1016/j.physletb.2014.11.055
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 539 Moderne Physik
Tag:hidden-beauty states; physics
Release Date:2016/10/17
Creating Corporation:ATLAS Collaboration
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung