Non-leptonic two-body weak decays of Λ (2286)

Abstract

We study the non-leptonic two-body weak decays of Λ + c (2286) → B n M with B n (M ) representing as the baryon (meson) states. Based on the SU (3) flavor symmetry, we can describe most of the data reexamined by the BESIII Collaboration with higher precisions. However, our result of B(Λ + c → pπ 0 ) = (5.6 ± 1.5) × 10 −4 is larger than the current experimental limit of 3 × 10 −4 (90% C.L.) by BESIII. In addition, we find that× 10 −4 , which are accessible to the BESIII experiments.

Antitriplet charmed baryon decays with SU(3) flavor symmetry

“…In fact, the decays of Λ þ c → B n M have been explained well by the global fit in Ref. [30], together with the predictions of BðΞ extracted from the ratios of BðΞ [31].…”

“…Since BESIII and LHCb are expected to search for all possible antitriplet charmed baryon decays, one can test whether or not the studies of Λ þ c → B n M can be applied to Ξ 0;þ c → B n M. Theoretically, the factorization for the b baryon decays [8][9][10][11][12][13] does not work for the charmed baryon decays, which receive corrections by taking into account the nonfactorizable effects [14][15][16][17][18][19]. On the other hand, the possible b or c hadron decay modes can be examined by the SUð3Þ f symmetry [20][21][22][23][24][25][26][27][28][29][30][31]. Furthermore, the symmetry approach has been extended to explore the doubly and triply charmed baryon decays [31], which helps to establish the spectroscopies of the doubly and triply charmed baryon states [32], such as the to-be-confirmed Ξ þ cc state [33][34][35][36][37][38].…”

Charmed baryon weak decays with SU(3) flavor symmetry

“…On the other hand, with the advantage of avoiding the detailed dynamics of QCD, the approach with SU(3) flavor (SU(3) f ) symmetry can relate decay modes in the b and c-hadron decays [22,[28][29][30][31][32][33][34][35][36][37], where the SU(3) amplitudes receive non-perturbative and non-factorizable effects, despite the unknown sources. In this paper, in terms of SU(3) f symmetry, we will examine the semileptonic and non-leptonic two-body B c decays, search for decay modes accessible to experiment, and establish the spectroscopy of the charmed baryon states.…”

“…Being demonstrated to well fit the measured values of B(Λ + c → B n M ) [37], SU(3) f symmetry can be used to study the Ξ 0,+ c → B n M decays. For example, according to the data in the PDG [1], it is given that 5) which result in 6) by bringing the predictions of eq.…”

“…(5.1) into the relations. On the other hand, the SU(3) parameters for B c → B n M have been extracted from the observed B(Λ + c → B n M ) data, given by [37] (a 1 , a 2 , a 3 ) = (0.257 ± 0.006, 0.121 ± 0.015, 0.092 ± 0.021) GeV 3 ,…”