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We study the decays of anti-triplet charmed baryon state $(\Xi_c^0,\Xi_c^+,\Lambda_c^+)$ based on $SU(3)$ flavor symmetry. In particular, after predicting ${\cal B}(\Xi_c^0\to \Xi^-\pi^+)=(15.7 \pm 0.7)\times 10^{-3}$ and B}(\Xi_c^+\to\Xi^-\pi^+\pi^+)=(14.7\pm 8.4)\times 10^{-3}$, we extract that B}(\Xi_c^0\to\Lambda K^-\pi^+,\Lambda K^+K^-,\Xi^- e^+\nu_e)=(16.8\pm 2.3,0.45\pm 0.11,48.7\pm 17.4)\times B}(\Xi_c^+\to p K_s^0 K_s^0,\Sigma^+ K^-\pi^+,\Xi^0\pi^+\pi^0,\Xi^0 e^+\nu_e)=(1.3\pm...

A bstract We study the semileptonic and non-leptonic charmed baryon decays with SU(3) flavor symmetry, where baryons can be B c = (Ξ 0 , Ξ + Λ ), ′ ( Σ (++,+,0) (+,0) Ω cc ) or ccc . With n (′) denoted as octet (decuplet), we find that → ℓ ν are forbidden, while − only existing Cabibbo- allowed modes for respectively. predict rarely studied M decays, such $$ \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...

We study the nonleptonic three-body charmed baryon weak decays of $\mathbf{B}_{c}\rightarrow\mathbf{B}_{n}PP^{\prime}$ under $SU(3)_{F}$ flavor symmetry, where $\mathbf{B}_{c}$ denotes anti-triplet baryon, comprising $(\Xi^{0}_{c},-\Xi^{+}_{c},\Lambda^{+}_{c})$, and $\mathbf{B}_{n}$ $P(P^{\prime})$ represent octet pseudoscalar meson states, respectively. In addition to 12 parameters from contributions color-antisymmetric part effective Hamiltonian, denoted as $H(\bar{\mathbf{6}})$, there are...

We analyze the decay processes of ${\bf B}_c \to {\bf B}_n M$ with $SU(3)_F$ flavor symmetry and spin-dependent amplitudes, where B}_c({\bf B}_n)$ $M$ are anti-triplet charmed (octet) baryon nonet meson states, respectively. In approach, it is first time that rates up-down asymmetries fully systematically studied without neglecting ${\cal O}(\overline{15})$ contributions color anti-symmetric parts in effective Hamiltonian. Our results based on quite different from previous theoretical values...

We study the three-body anti-triplet ${\bf B_c}\to {\bf B_n}MM'$ decays with $SU(3)$ flavor ($SU(3)_f$) symmetry, where B_c}$ denotes charmed baryon of $(\Xi_c^0,-\Xi_c^+,\Lambda_c^+)$, and B_n}$ $M(M')$ represent meson octets, respectively. By considering only S-wave $MM'$-pair contributions without resonance effects, can be decomposed into irreducible forms 11 parameters under $SU(3)_f$, which are fitted by 14 existing data, resulting in a reasonable value $\chi^2/d.o.f=2.8$ for fit....

We study the semileptonic decays ${\bf B_c} \to {\bf B_n} \ell^+ \nu_{\ell}$ where B_{c(n)}}$ is anti-triplet-charmed (octet) baryon with $SU(3)_f$ flavor symmetry and helicity formalism. In particular, we present decay branching ratios of $ B_n}\ell^+ \nu_\ell$ in three scenarios: (a) an exact equal masses for states B_c}$ (${\bf B_n}$), (b) parameters without baryonic momentum-transfer dependence, (c) transition form factors heavy quark limit. show that our results are all consistent...

We analyze the weak processes of anti-triplet charmed baryons decaying to octet and mesons with SU(3) flavor symmetry topological quark diagram scheme. study decay branching ratios without neglecting contributions from ${\cal O}(\overline{15})$ for first time in approach. The fitting results Cabibbo allowed suppressed decays $\Lambda_{c}^+$ are all consistent experimental data. predict singly decays. In particular, we find that B}(\Lambda_c^+\to p \pi^0)=(1.3\pm0.7)\times 10^{-4}$, which is...

We study the ratio of R=2Γ(Ξc0→Ξ−e+νe)/3Γ(Λc+→Λe+νe), which is found to be R=1(0.8) from exact (broken) SU(3) flavor symmetry, in sharp contrast average value Rav=0.59±0.10 ALICE collaboration and lattice QCD results. propose use mixing Ξc−Ξc′ resolve puzzle. From mass spectra, we find that angle |θc|=0.137(5)π, suppresses Ξc→Ξe+νe about 20% model-independently, resulting R≈0.6 with breaking effect. explicitly demonstrate R=0.70±0.09 bag model, also consistent Rav. To test mechanism,...

We explore the breaking effects of SU(3) flavor symmetry in singly Cabibbo-suppressed anti-triplet charmed baryon decays $$\mathbf{B}_c\rightarrow \mathbf{B}_n M$$ , with $$\mathbf{B}_c=(\Xi _c^0,\Xi _c^+,\Lambda _c^+)$$ and $$\mathbf{B}_n(M)$$ (pseudo-scalar) octets. find that these can be used to account for experimental data on decay branching ratios $${\mathcal {B}}(\Lambda _c^+\rightarrow \Sigma ^{0} K^{+},\Lambda K^{+})$$ $$R'_{K/\pi }={\mathcal {B}}(\Xi ^0_c \rightarrow \Xi ^- K^+)$$...

We study the singly charmed baryon two-body decays of $\mathbf{B}_c \rightarrow \mathbf{B}_D P$ under $SU(3)_{F}$ flavor symmetry, where ${\bf B}_{c}$ refers to anti-triplet baryons, and B}_{D}$ $P$ denote decuplet baryons pseudoscalar mesons, respectively. Compared literature, we adopt a concise reasonable treatment $SU(3)$ symmetry breaking, by considering final-state mass dependence partial waves. With 4 real parameters in total 9 experimental data points, achieve minimal...

We study the direct CP asymmetries in decays of $B^0 \to \Xi_c^+ \overline{\Xi}_c^-$ and $B_s^0 \Lambda_c^+ \overline{\Lambda}_c^-$, emphasizing critical role final-state interactions (FSIs). In these channels, small energy release suppresses short-distance contributions while enhancing long-distance effects. By separating decay amplitudes into S P waves, we show that P-wave component, carrying only a single weak phase, contributes negligibly to asymmetries. contrast, S-wave amplitude,...

A bstract nonzero electric dipole moment of a tauon, d τ , signals CP violation and provides an important probe for new physics. We study methods to measure at low energy e + − colliders through the processes → γ * ψ (2 S ) with ± decays into charged hadron tau neutrino. point out that, measuring energies hadron, Im( can be measured. On other hand, selecting events after traveling more than detector resolution distance, Re( also determined. find that precision Super Tau-Charm Facility (STCF)...

We give a systematic study of ${\bf B}_c\to {\bf B}_n V$ decays, where B}_c$ and $ B}_n$ correspond to the anti-triplet charmed octet baryons, respectively, while $V$ stand for vector mesons. calculate color-symmetric contributions decays from effective Hamiltonian with factorization approach extract anti-symmetric ones based on experimental measurements $SU(3)_F$ flavor symmetry. find that most existing data are consistent our fitting results. present all branching ratios Cabbibo allowed,...

We study the $\Xi_c- \Xi_c'$ mixing effects in semileptonic decays doubly charm baryons of $\Xi_{cc}$. focus on ratio ${\cal R}(\theta_c) \equiv {\cal B}( \Xi_{cc} \to \Xi_c' e^+ \nu_e)/ \Xi_c \nu_e) $ and find that $({\cal R}(\theta_0),{\cal R}(- \theta_0)) =(0.46 \pm 0.01,7.33 0.23)$ with $\theta_0 = 0.137\pi$, which are sharp contrast to R}(0)=2.15\pm0.11$ without mixing. The is enhanced~(suppressed) by a factor four for negative~(positive) $\theta_c$. In addition, polarization...

We study the branching ratios and up-down asymmetries in charmed baryon weak decays of ${\mathbf{B}}_{c}\ensuremath{\rightarrow}{\mathbf{B}}_{D}M$ with ${\mathbf{B}}_{c(D)}$ antitriplet (decuplet) $M$ pseudoscalar meson states based on flavor symmetry $SU(3{)}_{F}$. propose equal physical-mass schemes for hadronic to deal large variations decuplet momenta order fit current experimental data. find that our fitting results...

We present a systematic study of $\Lambda_c^+ \to {\cal B}_q \ell^+ \nu_\ell $ with ${\cal = (\Lambda, n)$ and $\ell =( e, \mu)$, examining all the possible decay observables based on homogeneous bag model (HBM) lattice QCD (LQCD). With HBM, we find that branching fractions polarization asymmetries daughter baryon $\Lambda$ are B}(\Lambda_c^+ \Lambda e^+ \nu_e, \mu^+ \nu_\mu, n \ell ^+ ) (3.78 \pm 0.25, 3.67\pm 0.23, 0.40\pm 0.04 )\%$ $\alpha_\Lambda (\Lambda_c^+ \nu_e,\Lambda\mu^+ \nu_\mu...

We systematically study the semileptonic decays of ${\mathbf{B}}_{\mathbf{c}}\ensuremath{\rightarrow}{\mathbf{B}}_{\mathbf{n}}{\ensuremath{\ell}}^{+}{\ensuremath{\nu}}_{\ensuremath{\ell}}$ in light-front constituent quark model, where ${\mathbf{B}}_{\mathbf{c}}$ represents antitriplet charmed baryons $({\mathrm{\ensuremath{\Xi}}}_{c}^{0},{\mathrm{\ensuremath{\Xi}}}_{c}^{+},{\mathrm{\ensuremath{\Lambda}}}_{c}^{+})$ and ${\mathbf{B}}_{\mathbf{n}}$ corresponds to octet ones. determine...

We study the weak radiative decays of ${\mathbf{B}}_{b}\ensuremath{\rightarrow}{\mathbf{B}}_{n}\ensuremath{\gamma}$ with ${\mathbf{B}}_{b(n)}$ antitriplet bottomed (octet) baryons in light-front quark model. obtain that $\mathcal{B}({\mathrm{\ensuremath{\Lambda}}}_{b}\ensuremath{\rightarrow}\mathrm{\ensuremath{\Lambda}}\ensuremath{\gamma})=(7.1\ifmmode\pm\else\textpm\fi{}0.3)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$, which agrees well current experimental value...

This paper serves as an update of the previous work entitled ``Heavy-flavor-conserving hadronic weak decays charmed and bottom baryons''. We make improvement on bag wave functions by removing center-of-mass motion bag. All baryon matrix elements are now calculated under same framework without introducing new parameters. The 4-quark operators found to be nearly twice larger than ones. branching fractions...

Aiming on testing the $\Xi_c-\Xi_c'$ mixing, we study decays of $\Xi_{cc}\to \Xi_c \pi$ with $\Xi_{cc} = (\Xi_{cc}^{++} , \Xi_{cc} ^+ )$, $\Xi_c (\Xi_c^{(\prime)+},\Xi_c^{(\prime)0})$ and $\pi (\pi^+ \pi^0)$. The soft-meson limit is considered along pole model, baryon matrix elements are evaluated by bag model without removing center-of-mass motion (CMM). We find that four-quark operator about twice larger once unwanted CMM removed. obtain ${\cal R} {\cal B}(\Xi_{cc}^+ \to \Xi_c^{\prime +}...

We study the up-down asymmetries in three-body anti-triplet charmed baryon decays of ${\bf B_c}\to{\bf B_n}MM' $ with $SU(3)_f$ flavor symmetry, where B_c}$ presents $(\Xi_c^0,-\Xi_c^+,\Lambda_c^+)$, while B_n}$ and $M^{(')}$ denote octet meson states, respectively. By assuming s-wave meson-pairs to be dominant constituents final state configurations, we can write spin-dependent decay amplitude into parity-conserving parity-violating parts, parametrized by 6 real parameters under $SU(3)_f$,...

We study the nonleptonic two-body weak decays of $\Lambda_b$ by modifying MIT bag model without introducing new parameters to construct momentum eigenstates baryons. find that branching ratios $\Lambda_b^0 \to \Lambda_c^+ \pi^-$, $\Lambda_c^+ K^-$, $p \pi^-$ and $pK^-$ are $(4.5\pm0.2)\times 10^{-3}$, $(3.4\pm 0.1)\times 10^{-4}$, $(5.0\pm 0.5)\times 10^{-6}$ $(6.0\pm 0.7) \times 10^{-6}$, which all well consistent with current experimental data, respectively. also explore P CP asymmetries...

A bstract The recent measurements of h → Zγ from ATLAS and CMS show an excess the signal strength μ Z = $$ {\left(\sigma \cdotp \mathcal{B}\right)}_{\textrm{obs}}/{\left(\sigma \mathcal{B}\right)}_{\textrm{SM}} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mfenced> <mml:mrow> <mml:mi>σ</mml:mi> <mml:mo>·</mml:mo> <mml:mi>B</mml:mi> </mml:mrow> </mml:mfenced> <mml:mi>obs</mml:mi> </mml:msub> <mml:mo>/</mml:mo> <mml:mi>SM</mml:mi> </mml:math> 2 . ± 0 7, normalized...