Author
Douglas Bryman
Other affiliations: University of Pisa, TRIUMF, Virginia Tech ...read more
Bio: Douglas Bryman is an academic researcher from University of British Columbia. The author has contributed to research in topics: Branching fraction & Pion. The author has an hindex of 36, co-authored 191 publications receiving 4562 citations. Previous affiliations of Douglas Bryman include University of Pisa & TRIUMF.
Topics: Branching fraction, Pion, Lepton, Muon, Neutrino
Papers published on a yearly basis
Papers
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University of Zurich1, University of Notre Dame2, CERN3, Brookhaven National Laboratory4, Durham University5, University of Hamburg6, Max Planck Society7, Autonomous University of Madrid8, University of Victoria9, Technische Universität München10, University of Cagliari11, Instituto Superior Técnico12, University of British Columbia13, University of Valencia14, International School for Advanced Studies15, University of Warsaw16, University of Lyon17, Yale University18, University of Manchester19, University of Pisa20, RWTH Aachen University21, University of Wisconsin-Madison22, University of Sussex23, University of Tokyo24, Argonne National Laboratory25, Helsinki Institute of Physics26, University of Oregon27, University of Zagreb28, KEK29, University of Southampton30, Paul Scherrer Institute31, Petersburg Nuclear Physics Institute32, University of California33, University of Paris34, University of Rome Tor Vergata35, Bulgarian Academy of Sciences36, University of Salento37, Boston University38, University of Würzburg39, International Centre for Theoretical Physics40, University of Murcia41, University of Michigan42, Indian Institute of Science43
TL;DR: In this article, the authors discuss the theoretical, phenomenological and experimental issues related to flavor phenomena in the charged lepton sector and in flavor conserving CP-violating processes.
Abstract: This chapter of the report of the “Flavor in the era of the LHC” Workshop discusses the theoretical, phenomenological and experimental issues related to flavor phenomena in the charged lepton sector and in flavor conserving CP-violating processes. We review the current experimental limits and the main theoretical models for the flavor structure of fundamental particles. We analyze the phenomenological consequences of the available data, setting constraints on explicit models beyond the standard model, presenting benchmarks for the discovery potential of forthcoming measurements both at the LHC and at low energy, and exploring options for possible future experiments.
384 citations
TL;DR: In this paper, the authors discuss the theoretical, phenomenological and experimental issues related to flavour phenomena in the charged lepton sector and in flavour-conserving CP-violating processes.
Abstract: This chapter of the report of the ``Flavour in the era of the LHC'' Workshop discusses the theoretical, phenomenological and experimental issues related to flavour phenomena in the charged lepton sector and in flavour-conserving CP-violating processes. We review the current experimental limits and the main theoretical models for the flavour structure of fundamental particles. We analyze the phenomenological consequences of the available data, setting constraints on explicit models beyond the Standard Model, presenting benchmarks for the discovery potential of forthcoming measurements both at the LHC and at low energy, and exploring options for possible future experiments.
312 citations
University of New Mexico1, Brookhaven National Laboratory2, Indian Institute of Technology Guwahati3, TRIUMF4, University of British Columbia5, Tsinghua University6, Stony Brook University7, Aristotle University of Thessaloniki8, Fermilab9, Kyoto University10, University of Alberta11, University of Fukui12, Osaka University13, National Defense Academy of Japan14
TL;DR: Experiment E949 at Brookhaven National Laboratory has observed three new events consistent with the decay in the pion momentum region as mentioned in this paper, with an exposure of $1.71 and an estimated total background of $0.93.
Abstract: Experiment E949 at Brookhaven National Laboratory has observed three new events consistent with the decay ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{
u}\overline{\ensuremath{
u}}$ in the pion momentum region $140l{P}_{\ensuremath{\pi}}l199\text{ }\text{ }\mathrm{MeV}/c$ in an exposure of $1.71\ifmmode\times\else\texttimes\fi{}{10}^{12}$ stopped kaons with an estimated total background of $0.93\ifmmode\pm\else\textpm\fi{}0.17(\mathrm{stat}{)}_{\ensuremath{-}0.24}^{+0.32}(\mathrm{syst})$ events. This brings the total number of observed ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{
u}\overline{\ensuremath{
u}}$ events to seven. Combining this observation with previous results, assuming the pion spectrum predicted by the standard model, results in a branching ratio of $\mathcal{B}({K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{
u}\overline{\ensuremath{
u}})=({1.73}_{\ensuremath{-}1.05}^{+1.15})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}10}$. An interpretation of the results for alternative models of the decay ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}+nothing$ is also presented.
249 citations
University of New Mexico1, Brookhaven National Laboratory2, Indian Institute of Technology Guwahati3, TRIUMF4, University of British Columbia5, Tsinghua University6, Aristotle University of Thessaloniki7, Stony Brook University8, Fermilab9, Kyoto University10, University of Alberta11, University of Fukui12, Osaka University13, National Defense Academy of Japan14
TL;DR: Three events for the decay K+-->pi+nounu have been observed in the pion momentum region below the K+>pi+pi0 peak, 140 pi+ nunu) = (1.73(-1.05)+1.15) x 10(-10) consistent with the standard model prediction as discussed by the authors.
Abstract: Three events for the decay K+-->pi+ nunu have been observed in the pion momentum region below the K+-->pi+pi0 peak, 140 pi+ nunu) = (1.73(-1.05)+1.15) x 10(-10) consistent with the standard model prediction.
198 citations
TL;DR: In this paper, a new measurement of the branching ratio of the electron-muon branching ratio was presented, which confirmed the electronmuon universality at the 0.2% level.
Abstract: A new measurement of the ${\mathrm{\ensuremath{\pi}}}^{+}$\ensuremath{\rightarrow}${\mathit{e}}^{+}$\ensuremath{
u} branching ratio gives ${\mathit{R}}_{\mathrm{\ensuremath{\pi}}\mathit{e}\ensuremath{
u}}$=\ensuremath{\Gamma}(\ensuremath{\pi}\ensuremath{\rightarrow}e\ensuremath{
u}+\ensuremath{\pi}\ensuremath{\rightarrow}e\ensuremath{
u}\ensuremath{\gamma})/\ensuremath{\Gamma} (\ensuremath{\pi}\ensuremath{\rightarrow}\ensuremath{\mu}\ensuremath{
u}+\ensuremath{\pi}\ensuremath{\rightarrow}\ensuremath{\mu}\ensuremath{
u}\ensuremath{\gamma}) =[1.2265\ifmmode\pm\else\textpm\fi{}0.0034(stat)\ifmmode\pm\else\textpm\fi{}0.0044(sys)]\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}4}$. This result is in agreement with standard model calculations and confirms the hypothesis of electron-muon universality at the 0.2% level.
164 citations
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TL;DR: This biennial Review summarizes much of particle physics, using data from previous editions.
12,798 citations
TL;DR: In this paper, the authors review the present status of QCD corrections to weak decays beyond the leading-logarithmic approximation, including particle-antiparticle mixing and rare and $\mathrm{CP}$-violating decays.
Abstract: We review the present status of QCD corrections to weak decays beyond the leading-logarithmic approximation, including particle-antiparticle mixing and rare and $\mathrm{CP}$-violating decays. After presenting the basic formalism for these calculations we discuss in detail the effective Hamiltonians of all decays for which the next-to-leading-order corrections are known. Subsequently, we present the phenomenological implications of these calculations. The values of various parameters are updated, in particular the mass of the newly discovered top quark. One of the central issues in this review are the theoretical uncertainties related to renormalization-scale ambiguities, which are substantially reduced by including next-to-leading-order corrections. The impact of this theoretical improvement on the determination of the Cabibbo-Kobayashi-Maskawa matrix is then illustrated. [S0034-6861(96)00304-2]
2,277 citations
TL;DR: In this paper, the first two terms of the effective lagrangian were constructed in an expansion in powers of 1/Λ and studied systematically possible effects of new interactions such as anomalous magnetic moments, deviations from universality in weak interactions and rare processes.
2,023 citations
TL;DR: In this article, a general analysis of extensions of the Standard Model which satisfy the criterion of Minimal Flavour Violation (MFV) is presented, with the most stringent constraints imposed by B → Xsγ.
1,277 citations
1,177 citations