Inclusive weak-annihilation decays and lifetimes of beauty-charmed baryons

Yang, Gui-Zhong; Liang, En-Pei; Qin, Qirong; Shao, Kang-Kang

doi:10.1103/physrevd.106.093013

Cited by 3 publications

(2 citation statements)

References 43 publications

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“…Meanwhile many properties of doubly heavy spectroscopy have been investigated in theory, such as the hadron spectrum [12][13][14][15][16], the "decay constant" or the so-called pole residue [17], and so on [18][19][20]. Focusing on the weak decays of doubly heavy baryons, there have been intense explorations ranging from the flavor SU(3) symmetry analyses [21] to the model-dependent determinations of form factors and decay widths [22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Light quark decays of doubly heavy baryons in light front approach

2023

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We explore the semileptonic and nonleptonic decays of doubly heavy baryons $$(\Omega _{cc}^{(*)+},\Omega _{bb}^{(*)0},\Omega _{bc}^{(*)-},\Omega _{bc}^{\prime 0})$$ ( Ω cc ( ∗ ) + , Ω bb ( ∗ ) 0 , Ω bc ( ∗ ) - , Ω bc ′ 0 ) induced by the $$s\rightarrow u$$ s → u transition. Hadronic form factors are parametrized by transition matrix elements and are calculated in the light front quark model. With the form factors, we make use of helicity amplitudes and analyze semileptonic and nonleptonic decay modes of doubly heavy baryons. Benchmark results for partial decay widths, branching fractions, forward–backward asymmetries and other phenomenological observables are derived. We find that typical branching fractions for semileptonic decays into $$\ell \bar{\nu }$$ ℓ ν ¯ are at the order $$10^{-7}-10^{-8}$$ 10 - 7 - 10 - 8 and the ones for nonleptonic decays are at the order $$10^{-5}$$ 10 - 5 , which are likely detectable such as in LHCb experiment. With the potential data accumulated in future, our results may help to shape our understanding of the decay mechanism in the presence of two heavy quarks.

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Section: Introductionmentioning

confidence: 99%

Light quark decays of doubly heavy baryons in light front approach

2023

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“…Since the discovery of X (3872) [1], more and more exotic hadronic states have been observed in experiments (see [2][3][4][5][6] for reviews and also are expected to found in future [7][8][9][10]). Together with mesons and baryons, they form a much more colorful and comprehensive "periodic table of hadrons", which provide dramatic platforms for deciphering the quantum chromodynamics.…”

Section: Introductionmentioning

confidence: 99%

Diagrammatic analysis of hidden- and open-charm tetraquark production in B decays

Qin

Jing-liang

2023

Eur. Phys. J. C

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Discoveries of tetraquarks not only enrich the hadronic spectrum but also provide more platforms to understand quantum chromodynamics. We study the production processes of hidden-charm and open-charm tetraquarks in B decays by analyzing their topological amplitudes. Relations between different channels are found, which confront tests by experiments to probe the nature of the tetraquarks. Furthermore, promising channels to find more tetraquarks are proposed.

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Semi-inclusive decays of B meson into a dark anti-baryon and baryons

Shi,

Xing,

Xing

2023

Eur. Phys. J. C

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Using the recently developed B-Mesogenesis scenario, we studied the semi-inclusive decays of B meson into a dark anti-baryon $$\psi $$ ψ plus any possible states X containing u/c and d/s quarks with unit baryon number. The two types of effective Lagrangians proposed by the scenario are both considered in the study. The semi-inclusive decay branching fractions of $$B\rightarrow X \psi $$ B → X ψ are calculated by the method of heavy quark expansion, where the non-perturbative contributions from the matrix elements of dimension-5 operators are included. We obtained the branching fractions as functions of the dark anti-baryon mass. Using the experimental upper limits of the branching fractions, we presented the constraints of the coupling constants in the B-Mesogenesis scenario.

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Inclusive weak-annihilation decays and lifetimes of beauty-charmed baryons

Cited by 3 publications

References 43 publications

Light quark decays of doubly heavy baryons in light front approach

Light quark decays of doubly heavy baryons in light front approach

Diagrammatic analysis of hidden- and open-charm tetraquark production in B decays

Semi-inclusive decays of B meson into a dark anti-baryon and baryons

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