Hydroxyethyl-starch use and PBM. a necessary update to the italian national guidelines

Hydroxyethyl-starch use and PBM a necessary update to the italian national guideline

On the recently observed tensions in B decays

In the LHC era, the discovery of New Physics signals is the major ambition of the high-energy physics community and flavor physics can provide access to new heavy particles (Kaluza-Klein modes, supersymmetric particles . . . ) in complementary way with respect to direct searches. Signals of possible deviations with respect to the Standard Model have been recently claimed both by BABAR and LHCb through the analyses of specific semileptonic B-meson decays. First, I’ll focus on semileptonic b → c decay with a τ lepton in the final states for which new BABAR measurements are available, showing a deviation from the Standard Model at 3.4 σ level. I study the effects of a new tensor operator in the effective weak Hamiltonian on a set of observables, in semileptonic B → D(∗) modes as well as in semileptonic B and Bs decays to excited charmed mesons. Moreover, I discuss the phenomenology of the mode B → K∗� +� −, in the framework of a warped extradimensional model. Since a complete set of form factor independent observables have been recently measured by the LHCb Collaboration, with few sizable deviations with respect to the Standard Model in some of them, it would be interesting to put constraints on such a scenario from the FCNC transition b → s�+�−

On the recent anomalies in semileptonic B decays

Both BABAR and LHCb Collaborations have recently claimed signals of pos- sible deviations with respect to the Standard Model through the analyses of specific semileptonic B-meson decays. We firstly investigate the semileptonic b → c decay with a τ lepton in the final state for which new BABAR measurements are available, showing a deviation from the Standard Model at 3.4 σ level. We study the effects of a new ten- sor operator in the effective weak Hamiltonian on a set of observables, in semileptonic B → D (∗) modes as well as in semileptonic B and Bs decays to excited charmed mesons. Moreover, we discuss the phenomenology of the mode B → K ∗ � + � − , in the framework of a warped extra-dimensional model. Since a complete set of form factor almost in- dependent observables have been recently measured by the LHCb Collaboration, with few sizable deviations with respect to the Standard Model in some of them, it would be interesting to put constraints on such a scenario from the FCNC transition b → s� + � − . 1 Semileptonic B-meson decays with a τ lepton in the final state

On the anomalies recently discovered in semileptonic B decays to the third family

The ratios R(D-(*)) = B(B -> D-(*) t (nu) over bar (tau))/B(B -> D-(*) mu(nu) over bar (mu)) measured by BABAR Collaboration deviate from the standard model expectations; at the same time the purely leptonic channel B -> tau(nu) over bar (tau) has been found in better consistency with the standard model. We provide an attempt to reconcile these two experimental facts, within a New Physics Scenario, by adding a tensor operator in the effective weak Hamiltonian. We calculate the effects of such an operator in a set of observables, in semileptonic B -> D-(*) modes as well as in semileptonic B and B-s decays to excited positive parity charmed mesons