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Hunting for imprints on the dimuon spectrum.
C Cornella1, G Isidori1, M König1
1Physik-Institut, Universität Zürich, 8057 Zurich, Switzerland.
The European Physical Journal. C, Particles and Fields
|December 7, 2020
Summary
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.
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.
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