Search for the rare decay B to pi l+ l-

Abstract

We have performed a search for the flavor-changing neutral-current decays B --> pi l+l-, where l+l- is either e+e- or mu+mu-, using a sample of 230 million Y(4S)-->BBbar decays collected with the BABAR detector. We observe no evidence of a signal and measure the upper limit on the isospin-averaged branching fraction to be BF(B --> pi l+ l-) < 9.1 x 10^{-8} at 90% confidence level. We also search for the lepton-flavor--violating decays B --> pi e mu and measure an upper limit on the isospin-averaged branching fraction of BF(B --> pi e mu) < 9.2 x 10^{-8} at 90% confidence level.

7 pages, 1 postscript figure; corrected typos, published in PRL

References in corpus (3)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Measurements of branching fractions, rate asymmetries, and angular distributions in the rare decays B --> Kl+l- and B --> K*l+l-

Cited by in corpus (19)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Flavor Physics in the Quark Sector
• Rare $B$ Decays as Tests of the Standard Model
• Left-Right SU(4) Vector Leptoquark Model for Flavor Anomalies
• $R_{K^{(\ast )}}$ and related $b\to s\ell \bar{\ell }$ anomalies in minimal flavor violation framework with $Z^{\prime }$ boson
• Simplified Models of Flavourful Leptoquarks
• Charged-Higgs Collider Signals with or without Flavor
• The rare decays $B_u^{+}\to {\pi }^{+}{\ell }^{+}{\ell }^{-}$, ${\rho }^{+}{\ell }^{+}{\ell }^{-}$ and $B_d^0\to {\ell }^{+}{\ell }^{-}$ in the R-parity violating supersymmetry
• Rare b hadron decays at the LHC
• Search for $B\to \pi {\ell }^{+}{\ell }^{-}$ Decays at Belle
• The third type of fermion mixing in the lepton and quark interactions with leptoquarks
• Gravitational Wave Signatures of Lepton Universality Violation
• A Search for the Rare Decays B --> pi l+l- and B0 --> eta l+l-
• Constraints on 2l2q operators from $\mu -e$ flavour-changing meson decays
• Enhanced $B_q\to \ell {\ell }^{\prime }$ and $B\to (K,\pi )\ell {\ell }^{\prime }$ in light of $(g-2{)}_{\mu }$
• Searches for Lepton Flavour Violation and Lepton Number Violation in Hadron Decays
• Constraining lepton flavor violating SMEFT $2q2\ell$ operators from low-energy cLFV processes