Measurement of Singly Cabibbo Suppressed Decays ${\Lambda }_c^{+}\to p{\pi }^{+}{\pi }^{-}$ and ${\Lambda }_c^{+}\to p{K}^{+}{K}^{-}$

Abstract

Using 567 $p{b}^{-1}$ of data collected with the BESIII detector at a center-of-mass energy of $\sqrt{s}=$ 4.599 $GeV$, near the ${\Lambda }_c^{+}{\Lambda }_c^{-}$ threshold, we study the singly Cabibbo-suppressed decays ${\Lambda }_c^{+}\to p{\pi }^{+}{\pi }^{-}$ and ${\Lambda }_c^{+}\to p{K}^{+}{K}^{-}$. By normalizing with respect to the Cabibbo-favored decay ${\Lambda }_c^{+}\to p{K}^{-}{\pi }^{+}$, we obtain ratios of branching fractions: $\frac{\mathcal{B}({\Lambda }_c^{+}\to p{\pi }^{+}{\pi }^{-})}{\mathcal{B}({\Lambda }_c^{+}\to p{K}^{-}{\pi }^{+})}$ = $(6.70\pm 0.48\pm 0.25)\%$, $\frac{\mathcal{B}({\Lambda }_c^{+}\to p\varphi )}{\mathcal{B}({\Lambda }_c^{+}\to p{K}^{-}{\pi }^{+})}$ = $(1.81\pm 0.33\pm 0.13)\%$, and $\frac{\mathcal{B}({\Lambda }_c^{+}\to p{K}^{+}{K}_{\text{non-}\varphi }^{-})}{\mathcal{B}({\Lambda }_c^{+}\to p{K}^{-}{\pi }^{+})}$ = $(9.36\pm 2.22\pm 0.71)\times 10^{-3}$, where the uncertainties are statistical and systematic, respectively. The absolute branching fractions are also presented. Among these measurements, the decay ${\Lambda }_c^{+}\to p{\pi }^{+}{\pi }^{-}$ is observed for the first time, and the precision of the branching fraction for ${\Lambda }_c^{+}\to p{K}^{+}{K}_{\text{non-}\varphi }^{-}$ and ${\Lambda }_c^{+}\to p\varphi$ is significantly improved.

References in corpus (12)

• Design and Construction of the BESIII Detector
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation
• ${\Lambda }_b\to p{\ell }^{-}{\bar{\nu }}_{\ell }$ and ${\Lambda }_b\to {\Lambda }_c{\ell }^{-}{\bar{\nu }}_{\ell }$ form factors from lattice QCD with relativistic heavy quarks
• Precision measurement of the integrated luminosity of the data taken by BESIII at center of mass energies between 3.810 GeV and 4.600 GeV
• Two-body hadronic charmed meson decays
• Measurements of absolute hadronic branching fractions of ${\Lambda }_c^{+}$ baryon
• Test Flavor SU(3) symmetry in Exclusive ${\Lambda }_c$ decays
• Exclusive Nonleptonic Decays of Bottom and Charm Baryons in a Relativistic Three-Quark Model: Evaluation of Nonfactorizing Diagrams
• SU(3)_flavor analysis of two-body weak decays of charmed baryons
• ${\Lambda }_b\to ({\Lambda }_c,p)\tau \nu$ decays within standard model and beyond
• Quark and Pole Models of Nonleptonic Decays of Charmed Baryons

Cited by in corpus (24)

• A review of the open charm and open bottom systems
• Precision measurement of the $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$ cross section near threshold
• Singly Cabibbo-suppressed hadronic decays of ${\Lambda }_c^{+}$
• Study of the Standard Model with weak decays of charmed hadrons at BESIII
• Asymmetries of anti-triplet charmed baryon decays
• Singly Cabibbo suppressed decays of ${\Lambda }_c^{+}$ with SU(3) flavor symmetry
• First Lattice QCD determination of semileptonic decays of charmed-strange baryons ${\Xi }_c$
• Two-body weak decays of doubly charmed baryons
• Rescattering mechanism of weak decays of double-charm baryons
• Charmed Baryon Weak Decays with Vector Mesons
• Charmed Baryon Weak Decays with Decuplet Baryon and SU(3) Flavor Symmetry
• Charmed baryon decays in $SU(3{)}_F$ symmetry
• Direct CP violation in beauty and charm hadron decays
• Fragmentation-fraction ratio $f_{{\Xi }_b}/f_{{\Lambda }_b}$ in $b$- and $c$-baryon decays
• Measurements of the branching fractions of ${\Lambda }_c^{+}\to p{\pi }^{-}{\pi }^{+}$, ${\Lambda }_c^{+}\to p{K}^{-}{K}^{+}$, and ${\Lambda }_c^{+}\to p{\pi }^{-}{K}^{+}$
• The $a_0(980)$ in the single Cabibbo-suppressed process ${\Lambda }_c\to {\pi }^0\eta p$
• Prospects for CP & P violation in ${\Lambda }_c^{+}$ decay at STCF
• Topological amplitudes of charmed baryon decays in the $SU(3{)}_F$ limit
• Measurement of the absolute branching fraction of the singly Cabibbo suppressed decay ${\Lambda }_c^{+}\to p{\eta }^{\prime }$
• Study of the resonance contributions in the ${\Xi }_b^{-}\to p{K}^{-}{K}^{-}$ decay
• Malaria Parasitic Detection using a New Deep Boosted and Ensemble Learning Framework
• Measurement of the absolute branching fraction of the three-body decay ${\Lambda }_c^{+}\to {\Xi }^0{K}^{+}{\pi }^0$ and search for ${\Lambda }_c^{+}\to n{K}^{+}{\pi }^0$, ${\Sigma }^0{K}^{+}{\pi }^0$ and $\Lambda K^{+}{\pi }^0$
• Measurements of Born Cross Sections for $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c(2595{)}^{-}+c.c.$ and $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c(2625{)}^{-}+c.c.$ at $\sqrt{s}=$4918.0 and 4950.9 MeV
• Observation of the Singly Cabibbo-Suppressed Decay ${\Lambda }_c^{+}\to {\Sigma }^{-}{K}^{+}{\pi }^{+}$