scholarly journals Ab initio three-loop calculation of the W -exchange contribution to nonleptonic decays of double charm baryons

2019 ◽  
Vol 99 (5) ◽  
Author(s):  
Thomas Gutsche ◽  
Mikhail A. Ivanov ◽  
Jürgen G. Körner ◽  
Valery E. Lyubovitskij ◽  
Zhomart Tyulemissov
Keyword(s):  
Ab Initio ◽  
Exchange Contribution ◽  
Nonleptonic Decays ◽  
Charm Baryons ◽  
Double Charm

New Results on Heavy Flavor Baryons

2006 ◽  
Vol 21 (27) ◽  
pp. 5482-5487
Author(s):  
James S. Russ
Keyword(s):  
High Sensitivity ◽  
Experimental Results ◽  
High Mass ◽  
Heavy Flavor ◽  
Lattice Gauge ◽  
Charm Baryon ◽  
Charm Baryons ◽  
Double Charm ◽  
Effective Theories ◽  
New Formula

Heavy flavor baryons are attractive systems for testing effective theories for weak lifetime and decay systematics. Recently, new experimental results have mitigated one historic problem in the weak lifetime systematics and continued another. The charm baryon system continues to show new high mass, narrow states well isolated from one another. The spectroscopy of these states will challenge new advances in lattice gauge theoretic calculations of baryon structure. Double charm baryons still are seen only by SELEX, which showed a new [Formula: see text] candidate. High-sensitivity searches by BELLE and BaBar show only featureless background.

scholarly journals Novel Ideas in Nonleptonic Decays of Double Heavy Baryons

Particles ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 339-356 ◽  
Author(s):  
Thomas Gutsche ◽  
Mikhail Ivanov ◽  
Jürgen Körner ◽  
Valery Lyubovitskij
Keyword(s):  
W Boson ◽  
New Physics ◽  
Lhcb Collaboration ◽  
Tree Level ◽  
Matrix Elements ◽  
Compositeness Condition ◽  
Heavy Baryons ◽  
Charm Baryon ◽  
Nonleptonic Decays ◽  
Double Charm

The recent discovery of double charm baryon states by the LHCb Collaborarion and their high precision mass determination calls for a comprehensive analysis of the nonleptonic decays of double and single heavy baryons. Nonleptonic baryon decays play an important role in particle phenomenology since they allow for studying the interplay of long and short distance dynamics of the Standard Model (SM). Furthermore, they allow one to search for New Physics effects beyond the SM. We review recent progress in experimental and theoretical studies of the nonleptonic decays of heavy baryons with a focus on double charm baryon states and their decays. In particular, we discuss new ideas proposed by the present authors to calculate the W-exchange matrix elements of the nonleptonic decays of double heavy baryons. An important ingredient in our approach is the compositeness condition of Salam and Weinberg, and an effective implementation of infrared confinement both of which allow one to describe the nonperturbative structure of baryons composed of light and heavy quarks. Furthermore, we discuss an ab initio calculational method for the treatment of the so-called W-exchange diagrams generated by W ± boson exchange between quarks. We found that the W ± -exchange contributions are not suppressed in comparison with the tree-level (factorizing) diagrams and must be taken into account in the evaluation of matrix elements. Moreover, there are decay processes such as the doubly Cabibbo-suppressed decay Ξ c + → p ϕ recently observed by the LHCb Collaboration, which is contributed to only by one single W-exchange diagram.

scholarly journals Exclusive nonleptonic decays of bottom and charm baryons in a relativistic three-quark model: Evaluation of nonfactorizing diagrams

1998 ◽  
Vol 57 (9) ◽  
pp. 5632-5652 ◽  
Author(s):  
M. A. Ivanov ◽  
J. G. Körner ◽  
V. E. Lyubovitskij ◽  
A. G. Rusetsky
Keyword(s):  
Quark Model ◽  
Model Evaluation ◽  
Nonleptonic Decays ◽  
Charm Baryons

scholarly journals Weak decays of bottom-charm baryons: $$\mathcal {B}_{bc}\rightarrow \mathcal {B}_bP$$

2021 ◽  
Vol 81 (6) ◽  
Author(s):  
Jia-Jie Han ◽  
Rui-Xiang Zhang ◽  
Hua-Yu Jiang ◽  
Zhen-Jun Xiao ◽  
Fu-Sheng Yu
Keyword(s):  
Final State Interaction ◽  
Light Quark ◽  
Decay Rates ◽  
Long Distance ◽  
Final State ◽  
Decay Modes ◽  
Weak Decays ◽  
Charm Baryon ◽  
Charm Baryons ◽  
Double Charm

AbstractAfter the discovery of the double-charm baryon $$\Xi _{cc}^{++}$$ Ξ cc + + by LHCb, one of the most important topics is to search for the bottom-charm baryons which contain a b quark, a c quark and a light quark. In this work, we study the two-body non-leptonic weak decays of a bottom-charm baryon into a spin-1/2 bottomed baryon and a light pseudoscalar meson with the short-distance contributions calculated under the factorization hypothesis and the long-distance contributions considering the final-state-interaction effects. The branching fractions of all fifty-seven decay channels are estimated. The results indicate that $$\Xi _{bc}^+\rightarrow \Xi _b^0\pi ^+$$ Ξ bc + → Ξ b 0 π + , $$\Xi _{bc}^{0}\rightarrow \Xi _{b}^{-}\pi ^+$$ Ξ bc 0 → Ξ b - π + and $$\Omega _{bc}^0\rightarrow \Omega _b^-\pi ^+$$ Ω bc 0 → Ω b - π + decay modes have relatively large decay rates and thus could be used to experimentally search for the bottom-charm baryons. The topological diagrams and the SU(3) symmetry of bottom-charm baryon decays are discussed.

Quark-diquark model description for double charm baryons

2010 ◽  
Vol 34 (9) ◽  
pp. 1399-1401 ◽  
Author(s):  
A Majethiya ◽  
B Patel ◽  
P. C Vinodkumar
Keyword(s):  
Model Description ◽  
Diquark Model ◽  
Charm Baryons ◽  
Double Charm
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