Probing right-handed currents in transitions

Probing right - handed currents in B → K ∗ l + l − transitions

Right - Handed Currents in B Decay Revisited

We critically re-examine the case for and against a sizeable right-handed component in the b → c charged current coupling with a strength ξ relative to the conventional left-handed current. Using data from CLEO on the decay B → Dlν, as well as our knowledge of Vcb extracted from both inclusive and exclusive processes, we are able to determine the presently allowed parameter space for ξ via HQET...

Right - handed currents , CP violation , and B →

Precision CP violation measurements in rare hadronicB decays could provide clean signatures of parity symmetric new physics, implying the existence of SU(2)L × SU(2)R×U(1)B−L×P symmetry at high energies. New contributions to the weak scale Hamiltonian which respect parity to O(1%) in supersymmetric realizations are compatible with an SU(2)R breaking scale MR ≤ MGUT, implying that sensitivity to...

Probing anomalous right–handed current in Zbb̄ vertex

Motivated by −2σ deviation from the Standard Model prediction for the forward–backward asymmetry of Z → bb̄ decay in the LEP data, we explore the anomalous couplings of Zbb̄ vertex through the electroweak precision test extended by including AFB. We introduce a new variable ǫ ′ b to measure the anomalous right-handed coupling in Zbb̄ vertex. Implications of our analysis on the nonuniversal contact...

Sterile neutrinos and right-handed currents in KATRIN

Abstract: Kurie-plot experiments allow for neutrino-mass measurements based on kinematics in an almost model-independent manner. A future tritium-based KATRIN-like experiment can be sensitive to light sterile neutrinos with masses below 18 keV, which are among the prime candidates for warm dark matter. Here we consider such keV neutrinos in left-right symmetric extensions, i.e. coupled to right...