204 citations · 366 across the 6 of their papers we have counts for
10 papers · 1 filter
Summary of hints for new physics from (quark) flavour physics
Roman Zwicky
Recently two hints for new physics have emerged: The B_s mixing phase phi_s and the rate of D_s -> (mu,tau) nu exposing a discrepancy of \sim 3 sigma and 3.8 sigma deviation from t…
Electroweak Precision Data and the Lee-Wick Standard Model
Thomas E. J. Underwood, Roman Zwicky
We investigate the electroweak precision constraints on the recently proposed Lee-Wick Standard Model at tree level. We analyze low energy, Z-pole (LEP1/SLC) and LEP2 data separate…
Unparticles and CP-violation
Roman Zwicky
We give a brief summary of the unparticle scenario proposed by Georgi. The CP-even phase of the propagator is exploited to study the CP-asymmetry in B+ --> tau+ + nu, which is neit…
Unparticles at heavy flavour scales: CP violating phenomena
Roman Zwicky
Coupling the scale invariant unparticle sector to flavour physics and assuming that it remains scale invariant we investigate its consequences in heavy flavour physics. A drastic f…
B->V gamma Beyond QCD Factorisation
Patricia Ball, Gareth W. Jones, Roman Zwicky
We calculate the main observables in and decays, i.e. branching ratios and CP and isospin asymmetries. We include QCD factorisation r…
Time-dependent CP Asymmetry in B->K* gamma as a (Quasi) Null Test of the Standard Model
Patricia Ball, Roman Zwicky
We calculate the dominant Standard Model contributions to the time-dependent CP asymmetry in B0->K*0 gamma, which is O(1/mb) in QCD factorisation. We find that, including all relev…