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by Vladimir A. Uvarov , 2001
"... Determination of the strangeness content of light-flavour isoscalars from their production rates in hadronic Z decays at LEP ..."
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Determination of the strangeness content of light-flavour isoscalars from their production rates in hadronic Z decays at LEP

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by Vladimir Uvarov , 2001
"... of the strangeness contents of light-flavour isoscalars from its production rates in hadronic Z decays ..."
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of the strangeness contents of light-flavour isoscalars from its production rates in hadronic Z decays

Crossing heavy-flavour thresholds in fragmentation functions

by Matteo Cacciari, Paolo Nason, Carlo Oleari
"... In analogy with parton distribution functions, also parton fragmentation functions obey matching conditions when crossing heavy-flavour thresholds. We compute these matching conditions at next-to-leading order in the strong coupling constant α S in the MS scheme. Our results can be used for the dyna ..."
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for the dynamical generation of the heavy-flavour component in next-to-leading order fits to light-hadrons fragmentation functions. Furthermore, when computing perturbatively the charm fragmentation function from first principles and evolving it to higher scales, our matching conditions should be used

Flavour and CP Violation

by Ulrich Nierste
"... Abstract. In this talk I review the status of B−B mixing in the Standard Model and the room for new physics in Bs−Bs and Bd−Bd mixing in the light of recent LHCb data. 1. ..."
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Abstract. In this talk I review the status of B−B mixing in the Standard Model and the room for new physics in Bs−Bs and Bd−Bd mixing in the light of recent LHCb data. 1.

Light Stop Decay in the MSSM with Minimal Flavour Violation

by M. Mühlleitner A, E. Popenda A
"... ar ..."
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Two-point Functions at Two Loops in Three Flavour Chiral Perturbation Theory †

by Gabriel Amorós A, Johan Bijnens A, Pere Talavera A , 1999
"... The vector and axial-vector two-point functions are calculated to nextto-next-to-leading order in Chiral Perturbation Theory for three light flavours. We also obtain expressions at the same order for the masses, m 2 π, m2 K and m 2 η, and the decay constants, Fπ, FK and Fη. We present some numerical ..."
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The vector and axial-vector two-point functions are calculated to nextto-next-to-leading order in Chiral Perturbation Theory for three light flavours. We also obtain expressions at the same order for the masses, m 2 π, m2 K and m 2 η, and the decay constants, Fπ, FK and Fη. We present some

Minimal flavour seesaw models

by M. B. Gavela A, T. Hambye B, D. Hernández A C, P. Hernández , 906
"... We explore realizations of minimal flavour violation (MFV) for the lepton sector. We find that it can be realized within those seesaw models where a separation of the lepton number and lepton flavour violating scales can be achieved, such as scalar mediated (type II) and inverse seesaw models. We pr ..."
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present in particular a simple implementation of the MFV hypothesis which differs in nature from those previously discussed. It allows to reconstruct the flavour structure of the model from the values of the light neutrino masses and mixing parameters, even in the presence of CP-violating phases

dynamical quark flavours

by Derek J. Hepburn A , 2001
"... I present results of recent work for the UKQCD collaboration on the light hadron spectrum using a nonperturbatively O(a)-improved Wilson action with two degenerate flavours of dynamical quarks on a 16 3 × 32 lattice. Values of the bare gauge coupling and bare dynamical quark mass were chosen to keep ..."
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I present results of recent work for the UKQCD collaboration on the light hadron spectrum using a nonperturbatively O(a)-improved Wilson action with two degenerate flavours of dynamical quarks on a 16 3 × 32 lattice. Values of the bare gauge coupling and bare dynamical quark mass were chosen

Lifetimes of b-flavoured hadrons

by Fulvia De Fazio , 2000
"... Abstract. I discuss the heavy quark expansion for the inclusive widths of heavy-light hadrons, which predicts quite well the experimental ratios of Bq meson lifetimes. As for Λb, current determinations of O(m −3 b) contribution to τ(Λb) do not allow to explain the small measured value of τ(Λb)/τ(Bd) ..."
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Abstract. I discuss the heavy quark expansion for the inclusive widths of heavy-light hadrons, which predicts quite well the experimental ratios of Bq meson lifetimes. As for Λb, current determinations of O(m −3 b) contribution to τ(Λb) do not allow to explain the small measured value of τ

Grand Unified Flavour Physics

by Susanne Westhoff , 909
"... Abstract. We probe the unification of down quarks and leptons in a supersymmetric SO(10) GUT. The large atmospheric neutrino mixing angle induces bR − sR transitions, which can account for the sizeable CP phase φs measured in Bs − Bs mixing. Corrections to down-quark-lepton unification from higher-d ..."
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in the lepton sector into flavour-changing neutral currents among down squarks. In particular, the atmospheric neutrino mixing angle leaves imprints of Yukawa unification in Bs observables. For light fermions, the mass relations between down quarks and leptons need to be corrected. To this end, one introduces
Results 11 - 20 of 567