Update of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo stretchy="false">|</mml:mo><mml:msub><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi><mml:mi>b</mml:mi></mml:mrow></mml:msub><mml:mo stretchy="false">|</mml:mo></mml:mrow></mml:math>from the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mover accent="true"><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mr

Bailey, Jon A.; Bazavov, A.; Bérnard, C.; Bouchard, C.; DeTar, Carleton; Du, Daping; El‐Khadra, Aida X.; Foley, J.; Freeland, E. D.; Gámiz, E.; Gottlieb, Steven; Heller, Urs M.; Kronfeld, A. S.; Laiho, J.; Levkova, L.; Mackenzie, Paul B.; Neil, Ethan T.; Qiu, Si-Wei; Simone, J. N.; Sugar, R.; Toussaint, D.; Water, Ruth S. Van de; Zhou, R.

doi:10.1103/physrevd.89.114504

Cited by 170 publications

(276 citation statements)

References 98 publications

Supporting

Mentioning

258

Contrasting

Order By: Relevance

“…• The accuracy of the determination of |V cb | is quite good but disturbing is the discrepancy between the inclusive and exclusive determinations [116,117], with the exclusive ones being visibly smaller [118]. We quote here only the average value provided by PDG.…”

Section: Searching For New Physics In Twelve Stepsmentioning

confidence: 99%

Towards the identification of new physics through quark flavour violating processes

2014

View full text Add to dashboard Cite

We outline a systematic strategy which should help in this decade to identify New Physics (NP) beyond the Standard Model (SM) by means of quark flavour violating processes and thereby to extend the picture of short distance physics down to the scales as short as 10 −20 m and even shorter distance scales corresponding to energies of 100 TeV. Rather than using all possible flavour violating observables that will be measured in the coming years at the LHC, SuperKEKB and in Kaon physics dedicated experiments at CERN, J-PARC and Fermilab, we concentrate on those observables that are theoretically clean and very sensitive to NP. Assuming that the data on the selected observables by us will be very precise, we stress the importance of correlations between these observables as well as of future precise calculations of non-perturbative parameters by means of lattice QCD simulations with dynamical fermions. Our strategy consists of twelve steps which we will discuss in detail illustrating possible outcomes with the help of the SM, models with constrained Minimal Flavour Violation (CMFV), MFV at large and models with tree-level FCNCs mediated by neutral gauge bosons and scalars. We also briefly summarize the status of a number of concrete models. We propose DNA-charts that exhibit correlations between flavour observables in different NP scenarios. The models with new left-handed and/or right-handed currents and non-MFV interactions can be distinguished transparently in this manner. We emphasize the important role of the stringent CMFV relations between various observables as standard candles of flavour physics. The pattern of deviations from these relations may help in identifying the correct NP scenario. The success of this program will be very much facilitated through direct signals of NP at the LHC even if LHC will not be able to probe the physics at scales shorter than 4×10 −20 m. We also emphasize the importance of lepton flavour violation, electric dipole moments and (g − 2) e,µ in these studies.

show abstract

Section: Searching For New Physics In Twelve Stepsmentioning

confidence: 99%

Towards the identification of new physics through quark flavour violating processes

2014

View full text Add to dashboard Cite

show abstract

“…Here, the current lattice prediction is h A1 (1) = 0.906 ± 0.013 [23], the rest of the three parameters like ρ D * , R 1 (1), R 2 (1) are fitted directly from the decay rate…”

Section: A Formalismmentioning

confidence: 99%

Looking for possible new physics in B→D(*)τντ in light of recent data

2017

View full text Add to dashboard Cite

We study the decays B → D ( * ) τ ντ in light of the available data from BABAR, Belle and LHCb. We divide our analysis into two parts: in one part we fit the form-factors in these decays directly from the data without adding any additional new physics (NP) contributions and compare our fit results with those available from the decays B → D ( * ) ν . We find that the q 2 -distributions of the formfactors associated with the pseudo-vector current, obtained from B → D ( * ) τ ντ and B → D ( * ) ν respectively, do not agree with each other, whereas the other form-factors are consistent with each other. In the next part of our analysis, we look for possible new effective operators of dimension 6 amongst new vector, scalar, and tensor-type that can best explain the current data in the decays B → D ( * ) τ ντ . We use the information-theoretic approaches, especially of 'Second-order Akaike Information Criterion' (AICc) in the analysis of empirical data. Normality tests for the distribution of residuals are done after selecting the best possible scenarios, for cross-validation. We find that it is the contribution from the operator involving left or right-handed vector current that passes all the selection criteria defined for the best-fit scenario and can successfully accommodate all the available data set.

show abstract

“…As with B → D * lν most work to date has focused on zero recoil. FNAL/MILC published results [40] for B → D * lν at zero recoil, obtaining an error commensurate with the current experimental precision. Using the MILC N f = 2 + 1 asqtad ensembles with asqtad light and FNAL charm and bottom valence quarks, they simulate at five lattice spacings (0.045, 0.06, 0.09, 0.12, and 0.15 fm) and with pions as light as 174 MeV, and found their leading error to be heavy-quark discretization effects.…”

Section: Pos(lattice2014)002mentioning

confidence: 61%

“…Heavy Flavors [40,49], shown in magenta, and previous year's results in gray [7]. (right) BABAR has measured a discrepancy of just over 3σ in the correlated ratios of branching fractions [50] defined in Eq.…”

Section: Pos(lattice2014)002mentioning

confidence: 99%