Now showing items 1-11 of 11

    • Measurements of Absolute Hadronic Branching Fractions of the Λ_c⁺ Baryon 

      Ablikim, M.; Achasov, M. N.; Ai, X. C.; Albayrak, O.; Albrecht, M.; Ambrose, D. J.; Amoroso, A.; Lou, Xinchou; BESIII Collaboration (American Physical Society, 2016-02-05)
      We report the first measurement of absolute hadronic branching fractions of Λ_c^+ baryon at the Î Λ_c^+ Λ_c^- production threshold, in the 30 years since the Λ_c^+ discovery. In total, 12 Cabibbo-favored Λ_c^+ hadronic ...
    • Observation of the Isospin-Violating Decay J/ψ → φπ⁰ f₀(980) 

      Ablikim, M.; Achasov, M. N.; Ai, X. C.; Albayrak, O.; Albrecht, M.; Ambrose, D. J.; Amoroso, A.; Lou, Xinchou; BESIII Collaboration (Amer Physical Soc, 2015-07)
      Using a sample of 1.31 x 10⁹ J/ψ events collected with the BESIII detector at the BEPCII collider, the decays J/ψ → φπ⁺π⁻π⁰ and J/ψ → φπ⁰π⁰π⁰ are investigated. The isospin-violating decay J/ψ → φπ⁰f₀(980) with f₀(980) → ...
    • Precision Study of η′ → γπ⁺π⁻ Decay Dynamics 

      Ablikim, M.; Achasov, M. N.; Ahmed, S.; Ai, X. C.; Albayrak, O.; Albrecht, M.; Lou, Xinchou; BESIII Collaboration (American Physical Society, 2018-11-05)
      Using a low background data sample of 9.7×10⁵ J/ψ→γη′, η′→γπ⁺π⁻ events, which are 2 orders of magnitude larger than those from the previous experiments, recorded with the BESIII detector at BEPCII, the decay dynamics of ...
    • Search for a Heavy Neutral Particle Decaying to εμ, ετ, or μτ in pp Collisions at √s = 8  TeV with the ATLAS Detector 

      Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Aben, R.; Abolins, M.; AbouZeid, O. S.; Izen, Joseph M.; Leyton, Michael; Meirose, Bernhard; Namasivayam, Harisankar; Reeves, Kendall; ATLAS Collaboration (American Physical Society, 2015-07-14)
      This Letter presents a search for a heavy neutral particle decaying into an opposite-sign different-flavor dilepton pair, e^{±}μ^{∓}, e^{±}τ^{∓}, or μ^{±}τ^{∓} using 20.3 fb⁻¹ of pp collision data at √s̅ = 8  TeV collected ...
    • Search for a Low-Mass Scalar Higgs Boson Decaying to a Tau Pair in Single-Photon Decays of ϒ(1s) 

      Lees, J. P.; Poireau, V.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Palano, A.; Eigen, G.; Izen, Joseph M.; Lou, Xinchou; BaBar Collaboration (American Physical Society, 2013-10-10)
      We search for a low-mass scalar CP-odd Higgs boson, A⁰, produced in the radiative decay of the upsilon resonance and decaying into a τ⁺τ⁻ pair: ϒ(1S)→γA⁰. The production of ϒ(1S) mesons is tagged by ϒ(2S) π⁺π⁻ ϒ(1S) ...
    • Search for D⁰ → γγ and Improved Measurement of the Branching Fraction for D⁰ → π⁰π⁰ 

      Ablikim, M.; Achasov, M. N.; Ai, X. C.; Albayrak, O.; Albrecht, M.; Ambrose, D. J.; Amoroso, A.; Lou, Xinchou; BESIII Collaboration (Amer Physical Soc, 2015-06-26)
      Using 2.92 fb⁻¹ of electron-positron annihilation data collected at √s̅ = 3.773 GeV with the BESIII detector, we report the results of a search for the flavor-changing neutral current process D⁰ → γγ using a double-tag ...
    • Search for Heavy Majorana Neutrinos with the ATLAS Detector in pp Collisions at √s̅ = 8 TeV 

      Aad, G.; Abbott, B.; Abdallah, J.; Abdel Khalek, S.; Abdinov, O.; Aben, R.; Abi, B.; Izen, Joseph M.; Leyton, Michael; Meirose, Bernhard; Namasivayam, Harisankar; Reeves, Kendall; ATLAS Collaboration (Springer, 2015-07-29)
      A search for heavy Majorana neutrinos in events containing a pair of high-p{T} leptons of the same charge and high-p{T} jets is presented. The search uses 20.3 fb⁻¹ of pp collision data collected with the ATLAS detector ...
    • Search for Lepton-Number Violating Processes in B⁺ → h⁻ l⁺ l⁺ Decays 

      Lees, J. P.; Poireau, V.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Palano, A.; Eigen, G.; Izen, Joseph M.; Lou, Xinchou; BaBar Collaboration (Amer Physical Soc, 2012-04-19)
      We have searched for the lepton-number violating processes B +→h -- +- + with h -=K -/π - and - +=e +/μ +, using a sample of 471±3 million BB̄ events collected with the BABAR detector at the PEP-II e +e - collider at the ...
    • Search for Long-Lived, Weakly Interacting Particles that Decay to Displaced Hadronic Jets in Proton-Proton Collisions at √s̅ = 8 TeV with the ATLAS Detector 

      Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Aben, R.; Abolins, M.; AbouZeid, O. S.; Izen, Joseph M.; Leyton, Michael; Meirose, Bernhard; Namasivayam, Harisankar; Reeves, Kendall; ATLAS Collaboration (Amer Physical Soc, 2015-07-17)
      A search for the decay of neutral, weakly interacting, long-lived particles using data collected by the ATLAS detector at the LHC is presented. This analysis uses the full data set recorded in 2012: 20.3 fb⁻¹ of proton-proton ...
    • Search for Super Symmetry in Events with B-Tagged Jets and Missing Transverse Momentum in pp Collisions at √s=13 TeV with the ATLAS Detector 

      Aaboud, M.; Aad, G.; Abbott, B.; Abdinov, O.; Abeloos, B.; Abidi, S. H.; AbouZeid, O. S.; Izen, Joseph M.; Meirose, Bernhard; Reeves, Kendall; ATLAS Collaboration (Springer, 2018-09-27)
      A search for the supersymmetric partners of the Standard Model bottom and top quarks is presented. The search uses 36.1 fb⁻¹ of pp collision data at √s = 13 TeV collected by the ATLAS experiment at the Large Hadron Collider. ...
    • Searches for Isospin-Violating Transitions χ_{c0,2} → π⁰η_c. 

      Ablikim, M.; Achasov, M. N.; Ai, X. C.; Albayrak, O.; Albrecht, M.; Ambrose, D. J.; Amoroso, A.; Lou, Xinchou; BESIII Collaboration (Amer Physical Soc, 2015-06-30)
      We present the first upper-limit measurement of the branching fractions of the isospin-violating transitions χ{c0,2} → π⁰η{c}. The measurements are performed using 106 x 10⁶ ψ(3686) events accumulated with the BESIII ...