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Journal of High Energy Physics

, 2017:147 | Cite as

Charmed baryon weak decays with SU(3) flavor symmetry

  • C. Q. Geng
  • Y. K. Hsiao
  • Chia-Wei Liu
  • Tien-Hsueh Tsai
Open Access
Regular Article - Theoretical Physics

Abstract

We study the semileptonic and non-leptonic charmed baryon decays with SU(3) flavor symmetry, where the charmed baryons can be B c  = (Ξ c 0 , Ξ c + , Λ c + ), B c  = (Σ c (++,+,0) , Ξ c ′ (+,0) , Ω c 0 ), B cc  = (Ξ cc + + , Ξ cc + , Ω c + ) or B cc  = Ω ccc + + . With B n (′) denoted as the baryon octet (decuplet), we find that the B c  → B n + ν decays are forbidden, while the Ω c 0  → Ω + ν , Ω cc +  → Ω c 0 + ν , and Ω ccc + +  → Ω cc + + ν decays are the only existing Cabibbo- allowed modes for B c  → B n + ν , B cc  → B c + ν , and B ccc  → B cc (′) + ν , respectively. We predict the rarely studied B c  → B n (′) M decays, such as \( \mathrm{\mathcal{B}}\left({\Xi}_c^0\to {\Lambda}^0{\overline{K}}^0,{\Xi}_c^{+}\to {\Xi}^0{\pi}^{+}\right)=\left(8.3\pm 0.9,\ 8.0\pm 4.1\right)\times {10}^{-3}\kern0.5em \mathrm{and}\kern0.5em \mathrm{\mathcal{B}}\left({\Lambda}_c^{+}\to {\Delta}^{++}{\pi}^{-},{\Xi}_c^0\to {\Omega}^{-}{K}^{+}\right)=\left(5.5\pm 1.3,\kern0.5em 4.8\pm 0.5\right)\times {10}^{-3} \). For the observation, the doubly and triply charmed baryon decays of \( {\Omega}_{cc}^{+}\to {\Xi}_c^{+}{\overline{K}}^0,{\Xi}_{cc}^{++}\to \left({\Xi}_c^{+}{\pi}^{+},{\varSigma}_c^{++}{\overline{K}}^0\right),\kern0.5em \mathrm{and}\kern0.5em {\Omega}_{ccc}^{++}\to \left({\Xi}_{cc}^{++}{\overline{K}}^0,{\Omega}_{cc}^{+}{\pi}^{+},{\Xi}_c^{+}{D}^{+}\right) \) are the favored Cabibbo-allowed decays, which are accessible to the BESIII and LHCb experiments.

Keywords

Global Symmetries Heavy Quark Physics 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

References

  1. [1]
    Particle Data Group collaboration, C. Patrignani et al., Review of Particle Physics, Chin. Phys. C 40 (2016) 100001 [INSPIRE].
  2. [2]
    BESIII collaboration, M. Ablikim et al., Measurements of absolute hadronic branching fractions of Λc+ baryon, Phys. Rev. Lett. 116 (2016) 052001 [arXiv:1511.08380] [INSPIRE].
  3. [3]
    BESIII collaboration, M. Ablikim et al., Evidence for the singly-Cabibbo-suppressed decay Λc+ → pη and search for Λc+ →  0, Phys. Rev. D 95 (2017) 111102 [arXiv:1702.05279] [INSPIRE].
  4. [4]
    LHCb collaboration, Observation of the doubly charmed baryon Ξcc+ +, Phys. Rev. Lett. 119 (2017) 112001 [arXiv:1707.01621] [INSPIRE].
  5. [5]
    LHCb collaboration, Observation of J/ψp Resonances Consistent with Pentaquark States in Λb0 → J/ψK p Decays, Phys. Rev. Lett. 115 (2015) 072001 [arXiv:1507.03414] [INSPIRE].
  6. [6]
    LHCb collaboration, Model-independent evidence for J/ψp contributions to Λb0 → J/ψpK decays, Phys. Rev. Lett. 117 (2016) 082002 [arXiv:1604.05708] [INSPIRE].
  7. [7]
    LHCb collaboration, Evidence for exotic hadron contributions to Λb0 → J/ψpπ decays, Phys. Rev. Lett. 117 (2016) 082003 [arXiv:1606.06999] [INSPIRE].
  8. [8]
    LHCb collaboration, Determination of the X(3872) meson quantum numbers, Phys. Rev. Lett. 110 (2013) 222001 [arXiv:1302.6269] [INSPIRE].
  9. [9]
    LHCb collaboration, Quantum numbers of the X(3872) state and orbital angular momentum in its ρ 0 Jψ decay, Phys. Rev. D 92 (2015) 011102 [arXiv:1504.06339] [INSPIRE].
  10. [10]
    LHCb collaboration, Observation of the resonant character of the Z(4430) state, Phys. Rev. Lett. 112 (2014) 222002 [arXiv:1404.1903] [INSPIRE].
  11. [11]
    SELEX collaboration, M. Mattson et al., First observation of the doubly charmed baryon Ξcc+, Phys. Rev. Lett. 89 (2002) 112001 [hep-ex/0208014] [INSPIRE].
  12. [12]
    SELEX collaboration, A. Ocherashvili et al., Confirmation of the double charm baryon Ξcc+(3520) via its decay to pD + K , Phys. Lett. B 628 (2005) 18 [hep-ex/0406033] [INSPIRE].
  13. [13]
    S.P. Ratti, New results on c-baryons and a search for cc-baryons in FOCUS, Nucl. Phys. Proc. Suppl. 115 (2003) 33 [INSPIRE].ADSCrossRefGoogle Scholar
  14. [14]
    BaBar collaboration, B. Aubert et al., Search for doubly charmed baryons Ξcc+and Ξcc+ + in BABAR, Phys. Rev. D 74 (2006) 011103 [hep-ex/0605075] [INSPIRE].
  15. [15]
    Belle collaboration, R. Chistov et al., Observation of new states decaying into Λc+ K π +and Λc+ K S0 π , Phys. Rev. Lett. 97 (2006) 162001 [hep-ex/0606051] [INSPIRE].
  16. [16]
    LHCb collaboration, Search for the doubly charmed baryon Ξcc+, JHEP 12 (2013) 090 [arXiv:1310.2538] [INSPIRE].
  17. [17]
    F.-S. Yu, H.-Y. Jiang, R.-H. Li, C.-D. Lü, W. Wang and Z.-X. Zhao, Discovery Potentials of Doubly Charmed Baryons, arXiv:1703.09086 [INSPIRE].
  18. [18]
    A. Ali, G. Kramer and C.-D. Lü, Experimental tests of factorization in charmless nonleptonic two-body B decays, Phys. Rev. D 58 (1998) 094009 [hep-ph/9804363] [INSPIRE].
  19. [19]
    C.Q. Geng, Y.K. Hsiao and J.N. Ng, Direct CP-violation in \( {B}^{\mp}\to p\overline{p}{K}^{\left(\ast \right)\pm } \), Phys. Rev. Lett. 98 (2007) 011801 [hep-ph/0608328] [INSPIRE].
  20. [20]
    Y.K. Hsiao and C.Q. Geng, Direct CP-violation in Λb decays, Phys. Rev. D 91 (2015) 116007 [arXiv:1412.1899] [INSPIRE].ADSGoogle Scholar
  21. [21]
    J.D. Bjorken, Spin Dependent Decays of the Λc, Phys. Rev. D 40 (1989) 1513 [INSPIRE].ADSGoogle Scholar
  22. [22]
    C.-D. Lü, W. Wang and F.-S. Yu, Test flavor SU(3) symmetry in exclusive Λc decays, Phys. Rev. D 93 (2016) 056008 [arXiv:1601.04241] [INSPIRE].ADSGoogle Scholar
  23. [23]
    H.-Y. Cheng and B. Tseng, Nonleptonic weak decays of charmed baryons, Phys. Rev. D 46 (1992) 1042 [Erratum ibid. D 55 (1997) 1697] [INSPIRE].
  24. [24]
    H.-Y. Cheng and B. Tseng, Cabibbo allowed nonleptonic weak decays of charmed baryons, Phys. Rev. D 48 (1993) 4188 [hep-ph/9304286] [INSPIRE].
  25. [25]
    P. Zenczykowski, Quark and pole models of nonleptonic decays of charmed baryons, Phys. Rev. D 50 (1994) 402 [hep-ph/9309265] [INSPIRE].
  26. [26]
    Fayyazuddin and Riazuddin, On the relative strength of W exchange and factorization contributions in hadronic decays of charmed baryons, Phys. Rev. D 55 (1997) 255 [Erratum ibid. D 56 (1997) 531] [INSPIRE].
  27. [27]
    R. Dhir and C.S. Kim, Axial-Vector Emitting Weak Nonleptonic Deacys of Ωc0 Baryon, Phys. Rev. D 91 (2015) 114008 [arXiv:1501.04259] [INSPIRE].ADSGoogle Scholar
  28. [28]
    X.-G. He, Y.K. Hsiao, J.Q. Shi, Y.L. Wu and Y.F. Zhou, The CP-violating phase γ from global fit of rare charmless hadronic B decays, Phys. Rev. D 64 (2001) 034002 [hep-ph/0011337] [INSPIRE].
  29. [29]
    H.-K. Fu, X.-G. He and Y.K. Hsiao, Bη(η )K(π) in the standard model with flavor symmetry, Phys. Rev. D 69 (2004) 074002 [hep-ph/0304242] [INSPIRE].
  30. [30]
    Y.K. Hsiao, C.-F. Chang and X.-G. He, A global SU(3)/U(3) flavor symmetry analysis for BPP with ηηMixing, Phys. Rev. D 93 (2016) 114002 [arXiv:1512.09223] [INSPIRE].ADSGoogle Scholar
  31. [31]
    X.-G. He and G.-N. Li, Predictive CP violating relations for charmless two-body decays of beauty baryons Ξb−,0and Λb0 with flavor SU(3) symmetry, Phys. Lett. B 750 (2015) 82 [arXiv:1501.00646] [INSPIRE].ADSCrossRefGoogle Scholar
  32. [32]
    M. He, X.-G. He and G.-N. Li, CP-Violating Polarization Asymmetry in Charmless Two-Body Decays of Beauty Baryons, Phys. Rev. D 92 (2015) 036010 [arXiv:1507.07990] [INSPIRE].ADSMathSciNetGoogle Scholar
  33. [33]
    M.J. Savage and R.P. Springer, SU(3) Predictions for Charmed Baryon Decays, Phys. Rev. D 42 (1990) 1527 [INSPIRE].ADSGoogle Scholar
  34. [34]
    M.J. Savage, SU(3) violations in the nonleptonic decay of charmed hadrons, Phys. Lett. B 257 (1991) 414 [INSPIRE].ADSCrossRefGoogle Scholar
  35. [35]
    G. Altarelli, N. Cabibbo and L. Maiani, Weak Nonleptonic Decays of Charmed Hadrons, Phys. Lett. B 57 (1975) 277 [INSPIRE].ADSCrossRefGoogle Scholar
  36. [36]
    W. Wang, Z.-P. Xing and J. Xu, Weak Decays of Doubly Heavy Baryons: SU(3) Analysis, arXiv:1707.06570 [INSPIRE].
  37. [37]
    C.Q. Geng, Y.K. Hsiao and Y.-H. Lin, Non-leptonic two-body weak decays of Λc(2286), arXiv:1708.02460 [INSPIRE].
  38. [38]
    S. Fajfer, P. Singer and J. Zupan, The Radiative leptonic decays D 0e + e γ, μ + μ γ in the standard model and beyond, Eur. Phys. J. C 27 (2003) 201 [hep-ph/0209250] [INSPIRE].
  39. [39]
    H.-n. Li, C.-D. Lü and F.-S. Yu, Branching ratios and direct CP asymmetries in DPP decays, Phys. Rev. D 86 (2012) 036012 [arXiv:1203.3120] [INSPIRE].ADSGoogle Scholar

Copyright information

© The Author(s) 2017

Authors and Affiliations

  • C. Q. Geng
    • 1
    • 2
  • Y. K. Hsiao
    • 1
    • 2
  • Chia-Wei Liu
    • 2
  • Tien-Hsueh Tsai
    • 2
  1. 1.School of Physics and Information EngineeringShanxi Normal UniversityLinfenChina
  2. 2.Department of PhysicsNational Tsing Hua UniversityHsinchuTaiwan

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