Observation of ${\Lambda }_c^{+}\to n{K}_S^0{\pi }^{+}$

Abstract

We report the first direct measurement of decays of the ${\Lambda }_c^{+}$ baryon involving the neutron. The analysis is performed using 567 pb${}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at $\sqrt{s}=4.599$ GeV with the BESIII detector at the BEPCII collider. We observe the decay ${\Lambda }_c^{+}\to n{K}_S^0{\pi }^{+}$ and measure the absolute branching fraction to be $\mathcal{B}({\Lambda }_c^{+}\to n{K}_S^0{\pi }^{+})=(1.82\pm 0.23(\mathrm{stat})\pm 0.11(\mathrm{syst}))\%$. A comparison to $\mathcal{B}({\Lambda }_c^{+}\to p(\bar{K}\pi {)}^0)$ provides an important test of isospin symmetry and final state interactions.

arXiv comment6 pages, 2 figures

References in corpus (13)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• 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
• Measurement of the center-of-mass energies at BESIII via the di-muon process
• Measurement of the absolute branching fraction for ${\Lambda }_c^{+}\to \Lambda e^{+}{\nu }_e$
• SU(3)_flavor analysis of two-body weak decays of charmed baryons
• Analysis of Two-Body Decays of Charmed Baryons Using the Quark-Diagram Scheme
• Weak decay of Lambda_c^+ for the study of Lambda(1405) and Lambda(1670)
• The $a_0(980)$ and $\Lambda (1670)$ in the ${\Lambda }_c^{+}\to {\pi }^{+}\eta \Lambda$ decay

Cited by in corpus (29)

• Weak Decays of Heavy Baryons in Light-Front Approach
• 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
• Three-body charmed baryon Decays with SU(3) flavor symmetry
• Singly Cabibbo suppressed decays of ${\Lambda }_c^{+}$ with SU(3) flavor symmetry
• First Lattice QCD determination of semileptonic decays of charmed-strange baryons ${\Xi }_c$
• First measurement of the form factors in $D_s^{+}\to K^0{e}^{+}{\nu }_e$ and $D_s^{+}\to K^{\ast 0}{e}^{+}{\nu }_e$ decays
• Charmed Baryon Weak Decays with Decuplet Baryon and SU(3) Flavor Symmetry
• Charmed baryon decays in $SU(3{)}_F$ symmetry
• Charmed Baryon Weak Decays with Vector Mesons
• Direct CP violation in beauty and charm hadron decays
• Observation of the Singly Cabibbo-Suppressed Decay ${\Lambda }_c^{+}\to n{\pi }^{+}$
• Study of the decay $D^0\to {\bar{K}}^0{\pi }^{-}{e}^{+}{\nu }_e$
• Fragmentation-fraction ratio $f_{{\Xi }_b}/f_{{\Lambda }_b}$ in $b$- and $c$-baryon decays
• Observation of the decay ${\Lambda }_c^{+}\to {\Sigma }^{-}{\pi }^{+}{\pi }^{+}{\pi }^0$
• ${\Lambda }_c$ semileptonic decays
• An overview of ${\Lambda }_c$ decays
• Prospects for CP & P violation in ${\Lambda }_c^{+}$ decay at STCF
• Observations of the Cabibbo-Suppressed decays ${\Lambda }_c^{+}\to n{\pi }^{+}{\pi }^0$, $n{\pi }^{+}{\pi }^{-}{\pi }^{+}$ and the Cabibbo-Favored decay ${\Lambda }_c^{+}\to n{K}^{-}{\pi }^{+}{\pi }^{+}$
• Angular Distributions for Multi-body Semileptonic Charmed Baryon Decays
• Hyperon production in ${\Lambda }_c^{+}\to K^{-}p{\pi }^{+}$ and ${\Lambda }_c^{+}\to K_S^{0}p{\pi }^0$
• Topological amplitudes of charmed baryon decays in the $SU(3{)}_F$ limit
• Measurement of the absolute branching fraction of the singly Cabibbo suppressed decay ${\Lambda }_c^{+}\to p{\eta }^{\prime }$
• Measurement of the absolute branching fraction of the inclusive decay ${\bar{\Lambda }}_c^{-}\to \bar{n}+X$
• Measurement of Branching Fractions for ${\Lambda }_c^{+}\to n{K}_S^0{\pi }^{+}$ and ${\Lambda }_c^{+}\to n{K}_S^0{K}^{+}$
• Baryons and baryoniums in the perspective of QCD sum rules
• First observation of the decay ${\Lambda }_c^{+}\to n{K}_S^0{\pi }^{+}{\pi }^0$
• Probing the isospin structure and low-lying resonances in ${\Lambda }_c^{+}\to n{\bar{K}}^0{\pi }^{+}$ decays