First observation of forward Z→bb¯ production in pp collisions at s√=8 TeV
The decay Z→bb¯ is reconstructed in pp collision data, corresponding to 2 fb −1 of integrated luminosity, collected by the LHCb experiment at a centre-of-mass energy of s=8 TeV. The product of the Z production cross-section and the Z→bb¯ branching fraction is measured for candidates in the fiducial...
| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
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Elsevier
2017
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| _version_ | 1797098889367519232 |
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| author | LHCb Collaboration Bjørn, M Cheung, S Evans, T Gandini, P Gruberg Cazon, B Hadavizadeh, T Hancock, T Harnew, N Hill, D Jalocha, P John, M Jurik, N Malde, S Nandi, A Pullen, H Rollings, A Veneziano, G Vesterinen, M Wilkinson, G |
| author_facet | LHCb Collaboration Bjørn, M Cheung, S Evans, T Gandini, P Gruberg Cazon, B Hadavizadeh, T Hancock, T Harnew, N Hill, D Jalocha, P John, M Jurik, N Malde, S Nandi, A Pullen, H Rollings, A Veneziano, G Vesterinen, M Wilkinson, G |
| author_sort | LHCb Collaboration |
| collection | OXFORD |
| description | The decay Z→bb¯ is reconstructed in pp collision data, corresponding to 2 fb −1 of integrated luminosity, collected by the LHCb experiment at a centre-of-mass energy of s=8 TeV. The product of the Z production cross-section and the Z→bb¯ branching fraction is measured for candidates in the fiducial region defined by two particle-level b-quark jets with pseudorapidities in the range 2.2 < η < 4.2, with transverse momenta p T > 20 GeV and dijet invariant mass in the range 45 < m jj < 165 GeV. From a signal yield of 5462±763 Z→bb¯ events, where the uncertainty is statistical, a production cross-section times branching fraction of 332±46±59 pb is obtained, where the first uncertainty is statistical and the second systematic. The measured significance of the signal yield is 6.0 standard deviations. This measurement represents the first observation of the Z→bb¯ production in the forward region of pp collisions. |
| first_indexed | 2024-03-07T05:16:08Z |
| format | Journal article |
| id | oxford-uuid:dd40b088-5b41-4d00-bc2b-0c86cfd899c1 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T05:16:08Z |
| publishDate | 2017 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:dd40b088-5b41-4d00-bc2b-0c86cfd899c12022-03-27T09:23:49ZFirst observation of forward Z→bb¯ production in pp collisions at s√=8 TeVJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:dd40b088-5b41-4d00-bc2b-0c86cfd899c1Symplectic Elements at OxfordElsevier2017LHCb CollaborationBjørn, MCheung, SEvans, TGandini, PGruberg Cazon, BHadavizadeh, THancock, THarnew, NHill, DJalocha, PJohn, MJurik, NMalde, SNandi, APullen, HRollings, AVeneziano, GVesterinen, MWilkinson, GThe decay Z→bb¯ is reconstructed in pp collision data, corresponding to 2 fb −1 of integrated luminosity, collected by the LHCb experiment at a centre-of-mass energy of s=8 TeV. The product of the Z production cross-section and the Z→bb¯ branching fraction is measured for candidates in the fiducial region defined by two particle-level b-quark jets with pseudorapidities in the range 2.2 < η < 4.2, with transverse momenta p T > 20 GeV and dijet invariant mass in the range 45 < m jj < 165 GeV. From a signal yield of 5462±763 Z→bb¯ events, where the uncertainty is statistical, a production cross-section times branching fraction of 332±46±59 pb is obtained, where the first uncertainty is statistical and the second systematic. The measured significance of the signal yield is 6.0 standard deviations. This measurement represents the first observation of the Z→bb¯ production in the forward region of pp collisions. |
| spellingShingle | LHCb Collaboration Bjørn, M Cheung, S Evans, T Gandini, P Gruberg Cazon, B Hadavizadeh, T Hancock, T Harnew, N Hill, D Jalocha, P John, M Jurik, N Malde, S Nandi, A Pullen, H Rollings, A Veneziano, G Vesterinen, M Wilkinson, G First observation of forward Z→bb¯ production in pp collisions at s√=8 TeV |
| title | First observation of forward Z→bb¯ production in pp collisions at s√=8 TeV |
| title_full | First observation of forward Z→bb¯ production in pp collisions at s√=8 TeV |
| title_fullStr | First observation of forward Z→bb¯ production in pp collisions at s√=8 TeV |
| title_full_unstemmed | First observation of forward Z→bb¯ production in pp collisions at s√=8 TeV |
| title_short | First observation of forward Z→bb¯ production in pp collisions at s√=8 TeV |
| title_sort | first observation of forward z bb¯ production in pp collisions at s√ 8 tev |
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