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Hunting for imprints on the dimuon spectrum.

C Cornella1, G Isidori1, M König1

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|December 7, 2020
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Summary
This summary is machine-generated.

Researchers explored indirect constraints on the B meson decay rate using dimuon spectrum data. They developed a method to analyze re-scattering processes and hadronic effects, achieving competitive bounds with current LHCb data.

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Area of Science:

  • High Energy Physics
  • Particle Physics
  • Quantum Chromodynamics

Background:

  • Precise measurement of B meson decays is crucial for understanding fundamental physics.
  • Direct measurements of the B meson decay rate can be challenging.
  • Indirect methods offer complementary approaches to constrain decay parameters.

Purpose of the Study:

  • To investigate the indirect constraint of the B meson decay rate using the dimuon spectrum.
  • To develop a method for simultaneously constraining non-standard re-scattering contributions and long-distance hadronic effects.
  • To estimate the sensitivity of the LHCb experiment to these constraints.

Main Methods:

  • Analysis of the B meson dimuon spectrum to identify distortions.
  • Modeling of B meson re-scattering processes.
  • Utilizing analytic properties of the amplitude combined with data and perturbative calculations to constrain hadronic effects.
  • Sensitivity studies at the LHCb experiment.

Main Results:

  • Demonstrated that constraints on the branching fraction of B meson decays can be achieved using current LHCb data, competitive with direct bounds.
  • Projected that improved bounds on the branching fraction could be obtained with future LHCb upgrade-II luminosity.

Conclusions:

  • Indirectly constraining B meson decay rates via the dimuon spectrum is feasible.
  • The proposed method effectively accounts for non-standard contributions and hadronic effects.
  • LHCb experiment, with current and future datasets, offers significant potential for precise measurements in this area.