Abstract: The branching ratio of the rare decay B → Xsγ provides potentially strong constraints on models beyond the Standard Model. Considering a general scenario with new heavy neutral gauge bosons, present in particular in Z ′ and gauge flavour models, we point out two new contributions to the B → Xsγ decay. The first one originates from one-loop diagrams mediated by gauge bosons and heavy exotic quarks with electric charge −1/3. The second contribution stems from the QCD mixing of neutral current-current operators generated by heavy neutral gauge bosons and the dipole operators responsible for the B → Xsγ decay. The latter mixing is calculated here for the first time. We discuss general sum rules which have to be satisfied in any model ...
We present measurements of the flavor-changing neutral current decays B→K + - and B→K* + -, where + ...
We present measurements of the flavor-changing neutral current decays B→K + - and B→K* + -, where + ...
The simplest extension of the Standard Model (SM) that generally introduces new sources of flavour v...
We study the potential effects of anomalous couplings of the third generation quarks to gauge bosons...
AbstractRare heavy-flavour decays are an ideal place to search for the effects of potential new part...
Rare heavy-flavour decays are an ideal place to search for the effects of potential new particles th...
AbstractIn models with an extra U(1)′ gauge boson family non-universal couplings to the weak eigenst...
We present evidence for the flavor-changing neutral current decay B\u2192K*\u2113+\u2113- and a meas...
The Bs → µ+µ − decay plays an outstanding role in tests of the Standard Model and physics beyond it....
Abstract The rare flavour-changing neutral current decay B s → μ + μ − is among the most important i...
The standard model of particle physics is our best description yet of fundamental particles and thei...
We study the potential effect of anomalous couplings of the third generation quarks to gauge bosons ...
Abstract: We investigate a speculative short-distance force, proposed to explain discrepancies obser...
Flavor-changing neutral current transitions are forbidden at tree level in the Standard Model and ca...
AbstractWe study the effects of an extra U(1)′ gauge boson with flavor changing couplings with fermi...
We present measurements of the flavor-changing neutral current decays B→K + - and B→K* + -, where + ...
We present measurements of the flavor-changing neutral current decays B→K + - and B→K* + -, where + ...
The simplest extension of the Standard Model (SM) that generally introduces new sources of flavour v...
We study the potential effects of anomalous couplings of the third generation quarks to gauge bosons...
AbstractRare heavy-flavour decays are an ideal place to search for the effects of potential new part...
Rare heavy-flavour decays are an ideal place to search for the effects of potential new particles th...
AbstractIn models with an extra U(1)′ gauge boson family non-universal couplings to the weak eigenst...
We present evidence for the flavor-changing neutral current decay B\u2192K*\u2113+\u2113- and a meas...
The Bs → µ+µ − decay plays an outstanding role in tests of the Standard Model and physics beyond it....
Abstract The rare flavour-changing neutral current decay B s → μ + μ − is among the most important i...
The standard model of particle physics is our best description yet of fundamental particles and thei...
We study the potential effect of anomalous couplings of the third generation quarks to gauge bosons ...
Abstract: We investigate a speculative short-distance force, proposed to explain discrepancies obser...
Flavor-changing neutral current transitions are forbidden at tree level in the Standard Model and ca...
AbstractWe study the effects of an extra U(1)′ gauge boson with flavor changing couplings with fermi...
We present measurements of the flavor-changing neutral current decays B→K + - and B→K* + -, where + ...
We present measurements of the flavor-changing neutral current decays B→K + - and B→K* + -, where + ...
The simplest extension of the Standard Model (SM) that generally introduces new sources of flavour v...