First observation of forward Z→bb[bar] production in pp collisions at √s=8TeV
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 r...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
2018
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| In: |
Physics letters
Year: 2017, Volume: 776, Pages: 430-439 |
| ISSN: | 1873-2445 |
| DOI: | 10.1016/j.physletb.2017.11.066 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1016/j.physletb.2017.11.066 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0370269317309589 
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| Author Notes: | LHCb Collaboration |
MARC
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| 245 | 1 | 0 | |a First observation of forward Z→bb[bar] production in pp collisions at √s=8TeV |c LHCb Collaboration |
| 246 | 3 | 0 | |a sqrt bb̄ bb[bar] |
| 246 | 3 | 3 | |a First observation of forward Z → bb bar production in pp collisions at square root s = 8 TeV |
| 264 | 1 | |c 2018 | |
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| 500 | |a Available online 5 December 2017 | ||
| 500 | |a The LHCb Collaboration: R. Aaij, P. d'Argent, S. Bachmann, D.Berninghoff, S. Braun, A. Comerma-Montells, M. De Cian, M. Dziewieck, S. Esen, D. Gerick, J.P Grabowski, X. Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, M. Kolpin, R. Kopecná, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, M. Neuner, T. Nikodem, A. Piucci, M. Stahl, S. Stemmle, U. Uwer, A. Zhelezov [und weitere] | ||
| 500 | |a Gesehen am 16.07.2019 | ||
| 520 | |a 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 pT>20 GeV and dijet invariant mass in the range 45<mjj<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. | ||
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