Branching ratio and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math>asymmetry for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:mn>1</mml:mn><mml:mmultiscripts><mml:mi>P</mml:mi><mml:mn>1</mml:mn><mml:none /><mml:mprescripts /><mml:none /><mml:mn>1</mml:mn></mml:mmultiscripts><mml:mi>γ</mml:mi></mml:math>decays

Aslam, M. Jamil; Riazuddin,

doi:10.1103/physrevd.75.034004

Cited by 3 publications

(1 citation statement)

References 37 publications

(27 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this regard, the corresponding exclusive radiative process B → Vγ (V is a vector meson) had been studied extensively both in SM [1][2][3] and in various NP scenarios [4,5]. Similarly, motivated by the above fact and the complementary confirmation the exclusive radiative decays B → Aγ, A is any of the axialvector mesons K 1 (1270), K 1 (1400), b 1 (1235)) and a 1 (1260), have also been studied in the context of large energy effective theory (LEET) in [6][7][8][9][10]. However, it is well known that among other effective field theories the power of soft collinear effective theory (SCET) lies in the fact that it provides a platform to study the decays at different momentum scales.…”

Section: Introductionmentioning

confidence: 99%

Radiative B to axial-vector meson decays at NLO in soft-collinear effective theory

Sikandar¹,

Aslam²,

Ahmed³

et al. 2021

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

The rare decay B → Aγ, with A representing axial-vector mesons such as K 1(1270), K 1(1400), b 1(1300), a 1(1260), is studied at next-to-leading order (NLO) in soft collinear effective theory (SCET). The large outgoing meson energy encourages the study of the decay with an appropriate factorization scheme that separates the factorizable and non-factorizable parts systematically. We have analyzed the leading-power and O ( α s ) diagrams that contribute to matching to SCETI. The new intermediate theory is matched onto SCETII and the running of SCETI operators is performed to sum large perturbative logarithms. The values of soft-overlap function ζ ⊥ for K 1(1270, 1400), a 1 and b 1 mesons are estimated from the light cone-sum-rules, and later using it the corresponding branching fractions for B → K 1 ( 1270 , 1400 ) , a 1 , b 1 γ decays are calculated. We find that in case of B → K 1(1270, 1400)γ decays the results are in good agreement with their experimental measurements. Also the estimated values of the branching ratios of the B → (b 1, a 1)γ decays are potentially large to be measured at the LHCb and future B-factories.

show abstract

Section: Introductionmentioning

confidence: 99%

Radiative B to axial-vector meson decays at NLO in soft-collinear effective theory

Sikandar¹,

Aslam²,

Ahmed³

et al. 2021

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

show abstract

A lattice QCD calculation of the transverse decay constant of the b1(1235) meson

et al. 2010

View full text Add to dashboard Cite

Rare decays of Λ b →Λ+γ and Λ b →Λ+l + l − in the light-cone sum rules

Wang

Lü

2009

Eur. Phys. J. C

View full text Add to dashboard Cite

The weak decays of Λ b → Λ + γ and Λ b → Λ + l + l − are investigated in the Standard Model using light-cone sum rules approach. The higher twist distribution amplitudes of Λ baryon to the leading conformal spin are included in the sum rules for transition form factors. Our results indicate that the higher twist distribution amplitudes almost have no influences on the transition form factors retaining the heavy quark spin symmetry, while such corrections can result in significant impacts on the form factors breaking the heavy quark spin symmetry. Two phenomenological models (COZ and FZOZ) for the wave function of Λ baryon are also employed in the sum rules for a comparison, which can give rise to the form factors approximately five times larger than that in terms of conformal expansion. Utilizing the form factors calculated in LCSR, the physical observables like decay rate, polarization asymmetry and forward-backward asymmetry are analyzed for the decays of Λ b → Λγ, Λl + l − . I. INTRODUCTION Generally, new physics can be accessible through rare decays, where the contributions from the Standard Model (SM) are suppressed enough. Hence, such decays can provide an ideal platform to test the SM precisely as well as to bound new physics parameters stringently. Rare decays involving b → s flavor changing neutral current (FCNC), which are forbidden at the tree level in the standard model, can only be induced by Glashow-Iliopoulos-Maiani mechanism [1] via loop diagrams. The Cabibbo-Kobayashi-Maskawa (CKM) matrix [2, 3] elements can be determined quantitatively from b → s rare decays, B 0 s −B 0 s mixing [4] etc., which will test its unitarity under the requirement of the SM.It is well known that the inclusive decays are relatively robust theoretically, since the decay rate can be systematically and reasonably approximated by the decay of a free b quark into light quarks, gluons and photons; but the counterpart of experimental measurements are quite difficult. On the

show abstract

Branching ratio andCPasymmetry forB→1P11γdecays

Cited by 3 publications

References 37 publications

Radiative B to axial-vector meson decays at NLO in soft-collinear effective theory

Radiative B to axial-vector meson decays at NLO in soft-collinear effective theory

A lattice QCD calculation of the transverse decay constant of the b1(1235) meson

Rare decays of Λ b →Λ+γ and Λ b →Λ+l + l − in the light-cone sum rules

Contact Info

Product

Resources

About