FCNC transitions of $$\Lambda _b$$ to neutron in Bethe–Salpeter equation approach

Liu, Liangliang; Wang, Chao; Kang, X. L.; Guo, Xin-Heng

doi:10.1140/epjc/s10052-020-7667-6

Cited by 10 publications

(14 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To check our results in the LFQM, we would also like to study the decays Our results of the branching ratios from the LFQM and SU(3) F are given in Table IV, where we have also shown the SU(3) F evaluations in Ref. [22] and some of other theoretical predictions in the literature, such as LCSR [23,24], BSE [25] and QM [27,29], as well as the current experimental data [15,16]. In particular, for b → sγ in the LFQM approach, we find that B(Λ b → Λγ) = (7.1 ± 0.3) × 10 −6 , which agrees well with the experimental measured value.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…In addition, our LFQM results in b → sγ agree well with both the predictions given by SU(3) F and Refs. [23][24][25]. Note that the values based on SU(3) F in Ref.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…These results in the baryon decays clearly provide great opportunities to test the SM. On the theoretical side, the radiative bottom decays of B b → B n γ with B n the the low-lying octet baryons have been studied with many approaches, such as the heavy quark effective theory [20], perturbative QCD [21], SU(3) F flavor symmetry [22], light-cone sum rule (LCSR) [23,24], Bethe-Salpeter equation (BSE) [25], quark model (QM) [26][27][28][29], and effective Lagrangian [30]. In this paper, we adopt the light front quark model (LFQM), where the quark spins and the center-of-mass motions of hadrons can be treated in a consistent and fully relativistic manner, as the wave functions of the baryons are manifestly boost invariant.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Weak Radiative Decays of Anti-triplet Bottomed Baryons in Light-Front Quark Model

Geng,

Liu,

Wei

et al. 2022

Preprint

View full text Add to dashboard Cite

We study the weak radiative decays of B b → B n γ with B b(n) the anti-triplet-bottom (octet) baryons in the light front quark model. We obtain that B(Λ b → Λγ) = (7.1 ± 0.3) × 10 −6 , which agrees well with the current experimental value of (7.1 ± 1.7) × 10 −6 . We predict that, which are consistent with the latest upper limits set by the LHCb collaboration. In addition, we find that the SU (3) F flavor symmetry breaking effects for the modes related to the b → dγ transition can be as large as 20%.

show abstract

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…In addition, our LFQM results in b → sγ agree well with both the predictions given by SU(3) F and Refs. [23][24][25]. Note that the values based on SU(3) F in Ref.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Weak Radiative Decays of Anti-triplet Bottomed Baryons in Light-Front Quark Model

Geng,

Liu,

Wei

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Examples of the application of LS and BS equations on the hadron physics could be found in Refs. [169,170,171,172], etc.. A typical BS integration equation reads…”

Section: Lippmann-schwinger and Bethe-salpeter Equationsmentioning

confidence: 99%

A Review on Partial-wave Dynamics with Chiral Effective Field Theory and Dispersion Relation

Yao,

Dai,

Zheng

et al. 2020

Preprint

View full text Add to dashboard Cite

The description of strong interaction physics of low-lying resonances is out of the valid range of perturbative QCD. Chiral effective field theories have been developed to tackle the issue. Partial wave dynamics is the systematic tool to decode the underlying physics and reveal the properties of those resonances. It is extremely powerful and helpful for our understanding of the non-perturbative regime, especially when dispersion techniques are utilized simultaneously. Recently, plenty of exotic/ordinary hadrons have been reported by experiment collaborations, e.g. LHCb, Belle, and BESIII, etc.. In this review, we summarize the recent progress on the applications of partial wave dynamics combined with chiral effective field theories and dispersion relations, on related topics, with emphasis on ππ, πK, πN and KN scatterings.

show abstract

“…[27], we can estimate the value of R and observe that it changes from to , which is not a constant. In our previous studies [28,29], we observed that the ratio R is not a constant in the rare decay in a large momentum region in which we did not consider the long distance contributions because they have a small effect on the FFs of this decay [30,31]. In these studies, (Λ) was considered a bound state of two particles: a quark and a scalar diquark.…”

Section: Introductionmentioning

confidence: 99%

Forward-backward asymmetries in in the Bethe-Salpeter equation approach *

Liu

Cui

et al. 2022

Chinese Phys. C

Self Cite

View full text Add to dashboard Cite

Using the Bethe-Salpeter equation (BSE) we investigate the forward-backward asymmetries $( A _{FB}) $ in $\Lambda_b \rightarrow \Lambda l^+ l^-(l=e,\mu,\tau)$ in the quark-diquark model. This approach provides precise form factors that are different from those of QCD sum rules. We calculate the rare decay form factors for $\Lambda_b \rightarrow \Lambda l^+ l^-$ and investigate the (integrated) forward-backward asymmetries in these decay channels. We find that the integrated $A^l_{FB}$, $\bar{A}^l_{FB}(\Lambda_b \rightarrow \Lambda e^+ e^-) \simeq -0.1371 $, $\bar{A}^l_{FB}(\Lambda_b \rightarrow \Lambda \mu^+ \mu^- ) \simeq -0.1376 $, $\bar{A}^l_{FB}(\Lambda_b \rightarrow \Lambda \tau^+ \tau^-) \simeq -0.1053 $, the hadron side asymmetries $\bar{A}^h_{FB}(\Lambda_b \rightarrow \Lambda \mu^+ \mu^-)\simeq -0.2315$, the lepton-hadron side asymmetries $\bar{A}^{lh}_{FB}(\Lambda_b \rightarrow \Lambda \mu^+ \mu^-)\simeq 0.0827$, the longitudinal polarization fractions $\bar{F}_L(\Lambda_b \rightarrow \Lambda \mu^+ \mu^-)\simeq 0.5681$. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

show abstract

FCNC transitions of $$\Lambda _b$$ to neutron in Bethe–Salpeter equation approach

Cited by 10 publications

References 68 publications

Weak Radiative Decays of Anti-triplet Bottomed Baryons in Light-Front Quark Model

Weak Radiative Decays of Anti-triplet Bottomed Baryons in Light-Front Quark Model

A Review on Partial-wave Dynamics with Chiral Effective Field Theory and Dispersion Relation

Forward-backward asymmetries in in the Bethe-Salpeter equation approach *

Contact Info

Product

Resources

About