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Amplitude Analysis of the B0 →k∗0μ+μ- Decay : Physical Review Letters

Aaij, R. ; Ruiz-Vidal, Joan LU and Zunica, G. (2024) In Physical Review Letters 132(13).
Abstract
An amplitude analysis of the B0→K∗0μ+μ- decay is presented using a dataset corresponding to an integrated luminosity of 4.7 fb-1 of pp collision data collected with the LHCb experiment. For the first time, the coefficients associated to short-distance physics effects, sensitive to processes beyond the standard model, are extracted directly from the data through a q2-unbinned amplitude analysis, where q2 is the μ+μ- invariant mass squared. Long-distance contributions, which originate from nonfactorizable QCD processes, are systematically investigated, and the most accurate assessment to date of their impact on the physical observables is obtained. The pattern of measured corrections to the short-distance couplings is found to be consistent... (More)
An amplitude analysis of the B0→K∗0μ+μ- decay is presented using a dataset corresponding to an integrated luminosity of 4.7 fb-1 of pp collision data collected with the LHCb experiment. For the first time, the coefficients associated to short-distance physics effects, sensitive to processes beyond the standard model, are extracted directly from the data through a q2-unbinned amplitude analysis, where q2 is the μ+μ- invariant mass squared. Long-distance contributions, which originate from nonfactorizable QCD processes, are systematically investigated, and the most accurate assessment to date of their impact on the physical observables is obtained. The pattern of measured corrections to the short-distance couplings is found to be consistent with previous analyses of b- to s-quark transitions, with the largest discrepancy from the standard model predictions found to be at the level of 1.8 standard deviations. The global significance of the observed differences in the decay is 1.4 standard deviations. © 2024 CERN. (Less)
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type
Contribution to journal
publication status
published
subject
keywords
Atomic physics, Amplitude analysis, Integrated luminosity, Invariant mass, Model prediction, Standard deviation, The standard model, Statistics
in
Physical Review Letters
volume
132
issue
13
article number
131801
publisher
American Physical Society
external identifiers
  • scopus:85188998187
ISSN
1079-7114
DOI
10.1103/PhysRevLett.132.131801
language
English
LU publication?
yes
id
314ce843-ad3c-47f6-8bfb-2fb10fc74b66
date added to LUP
2024-04-08 15:46:02
date last changed
2024-04-08 15:47:19
@article{314ce843-ad3c-47f6-8bfb-2fb10fc74b66,
  abstract     = {{An amplitude analysis of the B0→K∗0μ+μ- decay is presented using a dataset corresponding to an integrated luminosity of 4.7 fb-1 of pp collision data collected with the LHCb experiment. For the first time, the coefficients associated to short-distance physics effects, sensitive to processes beyond the standard model, are extracted directly from the data through a q2-unbinned amplitude analysis, where q2 is the μ+μ- invariant mass squared. Long-distance contributions, which originate from nonfactorizable QCD processes, are systematically investigated, and the most accurate assessment to date of their impact on the physical observables is obtained. The pattern of measured corrections to the short-distance couplings is found to be consistent with previous analyses of b- to s-quark transitions, with the largest discrepancy from the standard model predictions found to be at the level of 1.8 standard deviations. The global significance of the observed differences in the decay is 1.4 standard deviations.  © 2024 CERN.}},
  author       = {{Aaij, R. and Ruiz-Vidal, Joan and Zunica, G.}},
  issn         = {{1079-7114}},
  keywords     = {{Atomic physics; Amplitude analysis; Integrated luminosity; Invariant mass; Model prediction; Standard deviation; The standard model; Statistics}},
  language     = {{eng}},
  number       = {{13}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Amplitude Analysis of the B0 →k∗0μ+μ- Decay : Physical Review Letters}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.132.131801}},
  doi          = {{10.1103/PhysRevLett.132.131801}},
  volume       = {{132}},
  year         = {{2024}},
}