Cabibbo-favored nonleptonic decays of charmed baryons

Xu, Q. P.; Kamal, A. N.

doi:10.1103/physrevd.46.270

Cited by 64 publications

(77 citation statements)

References 37 publications

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“…N ΛcΛ ) on the factorizable contributions to the nonleptonic two-body decays of charmed baryons; such effects thus far have not been considered in the literature [16,26].…”

Section: Nonleptonic Decaymentioning

confidence: 99%

Erratum: Nonleptonic weak decays of charmed baryons [Phys. Rev.D 46, 1042 (1992)]

Cheng¹,

Tseng²

1997

Phys. Rev. D

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Weak current-induced baryonic form factors at zero recoil are evaluated in the rest frame of the heavy parent baryon using the nonrelativistic quark model. Contrary to previous similar work in the literature, our quark model results do satisfy the constraints imposed by heavy quark symmetry for heavy-heavy baryon transitions at the symmetric point v · v ′ = 1 and are in agreement with the predictions of the heavy quark effective theory for antitriplet-antitriplet heavy baryon form factors at zero recoil evaluated to order 1/m Q . Furthermore, the quark model approach has the merit that it is applicable to any heavy-heavy and heavy-light baryonic transitions at maximum q 2 . Assuming a dipole q 2 behavior, we have applied the quark model form factors to nonleptonic, semileptonic and weak radiative decays of the heavy baryons. It is emphasized that the flavor suppression factor occurring in many heavy-light baryonic transitions, which is unfortunately overlooked in most literature, is very crucial towards an agreement between theory and experiment for the semileptonic decay Λ c → Λe + ν e . Predictions for the decay modes Λ b → J/ψΛ, Λ c → pφ, Λ b → Λγ, Ξ b → Ξγ, and for the semileptonic decays of Λ b , Ξ b,c and Ω b are presented.

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“…N ΛcΛ ) on the factorizable contributions to the nonleptonic two-body decays of charmed baryons; such effects thus far have not been considered in the literature [16,26].…”

Section: Nonleptonic Decaymentioning

confidence: 99%

Erratum: Nonleptonic weak decays of charmed baryons [Phys. Rev.D 46, 1042 (1992)]

Cheng¹,

Tseng²

1997

Phys. Rev. D

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“…Körner, Krämer [13] Xu, Kamal [8] Cheng, Tseng [9] Ivanov et al [14] Żenczykowski [11] Sharma, Verma [12] Experiment [7] CA Pole …”

Section: Decaymentioning

confidence: 99%

“…Two explicit polemodel calculations were carried out in [8] and [9,10] and a variant of the pole model was considered in [11]. In [12], the S-wave amplitude was calculated using current algebra.…”

Section: Decaymentioning

confidence: 99%

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Singly Cabibbo-suppressed hadronic decays of Λc+

Cheng

Kang

2018

Phys. Rev. D

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We study singly Cabibbo-suppressed two-body hadronic decays of the charmed baryon Λ þ c , namely,We use the measured rate of Λ þ c → pϕ to fix the effective Wilson coefficient a 2 for naive color-suppressed modes and the effective number of color N eff c . We rely on the current-algebra approach to evaluate W-exchange and nonfactorizable internal W-emission amplitudes, that is, the commutator terms for the S wave and the pole terms for the P wave. Our prediction for Λ þ c → pη is in excellent agreement with the BESIII measurement. The pη (pπ 0 ) mode has a large (small) rate because of a large constructive (destructive) interference between the factorizable and nonfactorizable amplitudes for both S and P waves. Some of the SU(3) relations such asMðΛ þ c → pπ 0 Þ derived under the assumption of sextet dominance are not valid for decays with factorizable terms. Our calculation indicates that the branching fraction of Λ þ c → nπ þ is about 3.5 times larger than that of Λ þ c → pπ 0 . Decay asymmetries are found to be negative for all singly Cabibbo-suppressed modes and range from −0.56 to −0.96.

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“…Various theoretical approaches to weak decays of heavy baryons have been investigated, including the current algebra approach [101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116][117], factorization scheme, pole model technique [98,[118][119][120][121][122]], relativistic quark model [100,123], and quark diagram scheme [124,125]. Model predictions of the branching fractions and decay asymmetries can be found in Tables VI-VII of [1] for B c → B + P decays, …”

Section: Nonleptonic Decaysmentioning

confidence: 99%