<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mo>*</mml:mo></mml:msup><mml:msup><mml:mi>l</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>l</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>: Zeros of angular observables as test of standard model

Kumar, Girish; Mahajan, Namit

doi:10.1103/physrevd.93.054041

Cited by 25 publications

(42 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By fitting for the decay amplitudes as a function of q 2 , the q 2 values at which these observables cross zero can be determined. At leading -4 -JHEP02(2016)104 order these zero-crossing points are free from B 0 → K * 0 form-factor uncertainties and consequently provide a precision test of the SM [26,27]. The method is applied in the range 1.1 < q 2 < 6.0 GeV 2 /c 4 and is described in section 7.3.…”

Section: Jhep02(2016)104mentioning

confidence: 99%

Angular analysis of the B 0 → K *0 μ + μ − decay using 3 fb−1 of integrated luminosity

Aaij¹,

Beteta²,

Adeva³

et al. 2016

J. High Energ. Phys.

464

382

View full text Add to dashboard Cite

An angular analysis of the B 0 → K *0(→ K + π −)μ + μ − decay is presented. The dataset corresponds to an integrated luminosity of 3.0 fb−1 of pp collision data collected at the LHCb experiment. The complete angular information from the decay is used to determine CP-averaged observables and CP asymmetries, taking account of possible contamination from decays with the K + π − system in an S-wave configuration. The angular observables and their correlations are reported in bins of q 2, the invariant mass squared of the dimuon system. The observables are determined both from an unbinned maximum likelihood fit and by using the principal moments of the angular distribution. In addition, by fitting for q 2-dependent decay amplitudes in the region 1.1 < q 2 < 6.0 GeV2/c 4, the zero-crossing points of several angular observables are computed. A global fit is performed to the complete set of CP-averaged observables obtained from the maximum likelihood fit. This fit indicates differences with predictions based on the Standard Model at the level of 3.4 standard deviations. These differences could be explained by contributions from physics beyond the Standard Model, or by an unexpectedly large hadronic effect that is not accounted for in the Standard Model predictions

show abstract

Section: Jhep02(2016)104mentioning

confidence: 99%

Angular analysis of the B 0 → K *0 μ + μ − decay using 3 fb−1 of integrated luminosity

Aaij¹,

Beteta²,

Adeva³

et al. 2016

J. High Energ. Phys.

464

382

View full text Add to dashboard Cite

show abstract

“…Note that, as observed in the mesonic case [47,[94][95][96], the zero-crossing points are nearly free of hadronic uncertainties [38][39][40].…”

Section: Observables Inmentioning

confidence: 67%

“…Firstly, due to the spin-half nature of b and baryons, there is the potential to improve the currently limited understanding of the helicity structure of the underlying effective weak Hamiltonian [35][36][37]. Secondly, exploiting the full angular distribution of the four-body b → (→ pπ − )μ + μ − decay, one can obtain information on the underlying shortdistance Wilson coefficients of effective four-fermion operators, which is complementary to that obtained from the corresponding mesonic decays [38][39][40]. Experimentally, this decay was observed firstly by the CDF collaboration with 24 signal events and a statistical significance of 5.8 Gaussian standard deviations [41].…”

Section: Introductionmentioning

confidence: 98%

“…Starting with Eq. (3.17) and in terms of the angular coefficients K nλ , we can then construct the following observables [38][39][40]:…”

Section: Observables Inmentioning

confidence: 99%

“…As the b polarization in the LHCb setup has been measured to be small and compatible with zero [84], and the polarization effect will be averaged out for the symmetric ATLAS and CMS detectors, we consider only the case of unpolarized b decay. In order to reduce as much as possible the uncertainties arising from input parameters and transition form factors, we shall calculate all of the angular observables in some appropriate combinations [38][39][40]. For the b → transition form factors, we use the latest highprecision lattice QCD calculation [85], which is extrapolated to the whole q 2 region using the Bourrely-Caprini-Lellouch parametrization [86].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The $$\varvec{\Lambda _b\rightarrow \Lambda (\rightarrow p\pi ^-)\mu ^+\mu ^-}$$ Λ b → Λ ( → p π - ) μ + μ - decay in the aligned two-Higgs-doublet model

Yang

2017

Eur. Phys. J. C

View full text Add to dashboard Cite

The rare baryonic decay b → (→ pπ − ) μ + μ − provides valuable complementary information compared to the corresponding mesonic b → sμ + μ − transition. In this paper, using the latest high-precision lattice QCD calculation of the b → transition form factors, we study this interesting decay within the aligned twoHiggs-doublet model, paying particularly attention to the effects of the chirality-flipped operators generated by the charged scalars. In order to extract the full set of angular coefficients in this decay, we consider the following ten angular observables, which can be derived from the analysis of the subsequent parity-violating → pπ − decay: the differential branching fraction dB/dq 2 , the longitudinal polarization fraction F L , the lepton-, hadron-and combined lepton-hadron-side forward-backward asymmetries A FB , A FB and A FB , as well as the other five asymmetry observables Y i (i = 2, 3s, 3sc, 4s, 4sc). Detailed numerical comparisons are made between the SM and NP values for these angular observables. It is found that, under the constraints from the inclusive B → X s γ branching fraction and the latest global fit results of b → s data, the contributions of right-handed semileptonic operators O 9,10 , besides reconciling the P 5 anomaly observed in B 0 → K * 0 μ + μ − decay, could also enhance the values of dB/dq 2 and A FB in the bin [15,20] GeV 2 , leading to results consistent with the current LHCb measurements.

show abstract

Caloric Effects in Perovskite Oxides

Barman

Kar‐Narayan

Mukherjee

2019

Adv Materials Inter

View full text Add to dashboard Cite

Perovskite oxides show an amazing diversity of electronic and magnetic properties along with a myriad of structural variants and phase transitions. Large thermal changes may be driven near the ferroic phase transitions in perovskite oxides using magnetic, electric, and stress fields to manipulate conjugate order parameters. The ensuing magnetocaloric, electrocaloric, and mechanocaloric effects can be utilized for environment‐friendly and high‐efficiency solid‐state cooling applications. In this review the details of these caloric effects in perovskite oxides both from a chronological perspective and from the viewpoint of the recent advances in multiple caloric phenomena are described. The authors highlight the role of interfaces in oxide thin films for the different caloric effects and address some of the outstanding challenges for the fundamental understanding and practical implementation of perovskite oxides in solid state refrigeration.

show abstract

B→K*l+l−: Zeros of angular observables as test of standard model

Cited by 25 publications

References 39 publications

Angular analysis of the B 0 → K *0 μ + μ − decay using 3 fb−1 of integrated luminosity

Angular analysis of the B 0 → K *0 μ + μ − decay using 3 fb−1 of integrated luminosity

The $$\varvec{\Lambda _b\rightarrow \Lambda (\rightarrow p\pi ^-)\mu ^+\mu ^-}$$ Λ b → Λ ( → p π - ) μ + μ - decay in the aligned two-Higgs-doublet model

Caloric Effects in Perovskite Oxides

Contact Info

Product

Resources

About