The BaBar detector was built at SLAC to study the millions of B mesons produced by the PEP-II storage ring. The BaBar Collaboration consists of physicists and engineers from institutions in several countries.

### BaBar Collaboration Statement on the War in Ukraine

Accessing the Babar dataset via the BaBar Associates open-access program

To invite BaBar speakers to present results at physics conferences:  [Click here]
BaBar Management Team
Michael Roney (Spokesperson)
Fabio Anulli (Physics Coordinator), Frank Porter (Deputy Physics Coordinator)
Tina Cartaro and Marcus Ebert (Computing Coordinators)

Janis McKenna (Speakers Bureau Chair)
William Gary (Publication Board Chair)
Fabrizio Bianchi (Collaboration Council Chair)

BaBar Collaboration Meetings 2023 :  March 8-9 (remotely) June 26-27 (remotely) December 12-14 (maybe in person)
BaBar Event Calendars:  [BaBar 2023 Calendar] [BaBar 2022 Calendar]
External links:  [HFLAV] [PDG] [HEP preprints]

 Recent published BaBar papers and submissions 02/01/2023 Search for B Mesogenesis at BaBar (submitted to PhysRevD.) 09/13/2022 Search for Heavy Neutral Leptons Using Tau Lepton Decays at BaBar (accepted for publication in PhysRevD.) 07/01/2022 Study of the reactions $$e^+e^-\to K^+K^-\pi^0\pi^0\pi^0$$, $$e^+e^-\to K^{0}_{S}K^{\pm}\pi^{\mp}\pi^0\pi^0$$, and $$e^+e^-\to K^{0}_{S}K^{\pm}\pi^{\mp}\pi^+\pi^-$$ at center-of-mass energies from threshold to 4.5 GeV using ISR (accepted for publication in PhysRevD.) 04/01/2022 Search for an Axion-like Particle in B-Meson Decays (PhysRevLett.128.131802) 03/03/2022 Search for Lepton Flavor Violation in $$\Upsilon(3S)\to e^\pm\mu^\mp$$ (PhysRevLett.128.091804) 01/11/2022 Search for Darkonium in $$e^+e^-$$ Collisions (PhysRevLett.128.021802) 12/14/2021 Study of the reactions $$e^+e^-\to\pi^+\pi^-\pi^0\pi^0\pi^0\pi^0$$ and $$e^+e^-\to\pi^+\pi^-\pi^0\pi^0\pi^0\eta$$ at center-of-mass energies from threshold to 4.5 GeV using initial-state radiation (PhysRevD.104.112004) 12/14/2021 Study of the process $$e^+e^-\to\pi^+\pi^-\pi^0$$ using initial-state radiation with BaBar (PhysRevD.104.112003) 10/07/2021 Light meson spectroscopy from Dalitz plot analyses of $$\eta_c$$ decays to $$\eta^{'}K^+K^-, \eta^{'}\pi^+\pi^-,$$ and $$\eta\pi^+\pi^-$$ produced in two-photon interactions (PhysRevD.104.072002) 05/06/2021 Study of the reactions $$e^+e^-\to2(\pi^+\pi^-)\pi^0\pi^0\pi^0$$ and $$e^+e^-\to2(\pi^+\pi^-)\pi^0\pi^0\eta$$ at center-of-mass energies from threshold to 4.5 GeV using initial-state radiation (PhysRevD.103.092001) 12/08/2020 Precision Measurement of the Ratio $$\mathcal{B}(\Upsilon(3S)\to\tau^+\tau^-)/\mathcal{B}(\Upsilon(3S)\to\mu^+\mu^-)$$ (PhysRevLett.125.241801)
All published BaBar papers can be found HERE.

 BaBar Milestones December 2018 BaBar Collaboration Meeting and 25th anniversary celebration is at SLAC on December 11-13, 2018. 25th anniversary event registration and agenda (Indico),    Collaboration Meeting page and registration(). November 2017 BaBar's search for invisibly decaying dark photons highlighted in LBNL press release Symmetry and Interactions August 2017 Congratulations to BaBar's Blair Ratcliff for winning the 2017 APS Division of Particles and Fields Instrumentation Award "For the development of novel detectors exploiting the Cherenkov radiation to enhance the capabilities of frontier experiments devoted to the study of beauty and charm hadrons and atmospheric neutrino." SLAC press release June/July 2017 The lepton universality tension in B -> D(*) tau nu, recently reviewed in a Nature article, was subsequently followed up with coverage in Scientific American, Nature Correspondence and Science Friday Broadcast of 21 July 2017. January 2016 Congratulations to PEP-II and BaBar's Jonathan Dorfan and David Hitlin, along with KEK-B and Belle's Stephen Olsen and Fumihiko Takasaki, for winning the 2016 APS W.K.H Panofsky Prize in Experimental Particle Physics. Celebration of Dorfan and Hitlin Panofsky Prize: Wednesday, 13 January 2016, SLAC Meeting Agenda November 2014 Viewpoint article on our dark photon search published in Physical Review Letters. . June 2014 Physics Of  B-Factories Book; Published as Eur.Phys.J. C74 (2014) 3026;   (α, β, γ version) May 2013 Babar NIM Paper Update Project Home Page, published as NIMA 729, 615-701, 2013, arXiv:1305.3560 May 2012 BABAR Data in Tension with the Standard Model;  paper: arXiv:1205.5442, published as Phys. Rev. Lett. 109, 101802 (2012) October 2008 The 2008 Nobel Prize in Physics was awarded to Kobayashi, Maskawa, and Nambu for their work on symmetry breaking and CP violation. Understanding the origins of CP violation is one of the primary goals of the experimental programs of both the BaBar and Belle experiments, which were mentioned by name in the Nobel press release. The BaBar Collaboration has prepared a statement explaining the meaning and importance of this work. [Poster Link] See also related articles at:  SLAC Today   Nature   Science   Symmetry Magazine    Videos of the Nobel lectures are also available. See Kobayashi, Maskawa, and Nambu. -

 Page Maintainer: BaBar Last updated: Tuesday, 14-Mar-2023 09:12:24 PDT