Journal article
Measurement of the forward-backward asymmetry in Z/γ∗ -> μ+μ− decays and determination of the effective weak mixing angle
- Abstract:
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The forward-backward charge asymmetry for the process qq̅ → Z/γ∗ → μ+μ− is measured as a function of the invariant mass of the dimuon system. Measurements are performed using proton proton collision data collected with the LHCb detector at √s=7 and 8 TeV, corresponding to integrated luminosities of 1 fb−1 and 2 fb−1 respectively. Within the Standard Model the results constrain the effective electroweak mixing angle to be
sin2θeffW = 0.23142 ± 0.00073 ± 0.00052 ± 0.00056,
where the first uncertainty is statistical, the second systematic and the third theoretical. This result is in agreement with the current world average, and is one of the most precise determinations at hadron colliders to date.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Version of record, pdf, 808.4KB, Terms of use)
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- Publisher copy:
- 10.1007/JHEP11(2015)190
Authors
- Publisher:
- Springer Verlag
- Journal:
- Journal of High Energy Physics More from this journal
- Volume:
- 2015
- Issue:
- 11
- Pages:
- 1-19
- Publication date:
- 2015-11-27
- DOI:
- EISSN:
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1029-8479
- ISSN:
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1126-6708
- Keywords:
- Pubs id:
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pubs:569810
- UUID:
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uuid:e0d28d88-0a89-4a9e-87e6-21f9332d6fe5
- Local pid:
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pubs:569810
- Source identifiers:
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569810
- Deposit date:
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2016-11-12
Terms of use
- Copyright holder:
- CERN
- Copyright date:
- 2015
- Notes:
-
Open Access. This article is distributed under the terms of the Creative Commons
Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited.
- Licence:
- CC Attribution (CC BY)
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