Search results for "Lambda"
showing 10 items of 632 documents
"K+L0_dcs09" of "$K^+\Lambda$ and $K^+\Sigma^0$ photoproduction with fine center-of-mass energy resolution"
2022
Excitation function at cos(Theta_K+)cm = 0.0
"K+L0_dcs02" of "$K^+\Lambda$ and $K^+\Sigma^0$ photoproduction with fine center-of-mass energy resolution"
2022
Excitation function at cos(Theta_K+)cm = -0.7
"K+L0_dcs03" of "$K^+\Lambda$ and $K^+\Sigma^0$ photoproduction with fine center-of-mass energy resolution"
2022
Excitation function at cos(Theta_K+)cm = -0.6
"K+L0_dcs06" of "$K^+\Lambda$ and $K^+\Sigma^0$ photoproduction with fine center-of-mass energy resolution"
2022
Excitation function at cos(Theta_K+)cm = -0.3
"K+L0_dcs10" of "$K^+\Lambda$ and $K^+\Sigma^0$ photoproduction with fine center-of-mass energy resolution"
2022
Excitation function at cos(Theta_K+)cm = 0.1
"K+L0_dcs12" of "$K^+\Lambda$ and $K^+\Sigma^0$ photoproduction with fine center-of-mass energy resolution"
2022
Excitation function at cos(Theta_K+)cm = 0.3
Measurement of matter-antimatter differences in beauty baryon decays
2017
Differences in the behaviour of matter and antimatter have been observed in $K$ and $B$ meson decays, but not yet in any baryon decay. Such differences are associated with the non-invariance of fundamental interactions under the combined charge-conjugation and parity transformations, known as $C\!P$ violation. Using data from the LHCb experiment at the Large Hadron Collider, a search is made for $C\!P$-violating asymmetries in the decay angle distributions of $\Lambda^0_b$ baryons decaying to $p\pi^-\pi^+\pi^-$ and $p\pi^-K^+K^-$ final states. These four-body hadronic decays are a promising place to search for sources of $C\!P$ violation both within and beyond the Standard Model of particle…
Evidence for the singly Cabibbo suppressed decayΛc+→pηand search forΛc+→pπ0
2017
We study the singly Cabibbo suppressed decays Lambda(+)(c) -> p eta and Lambda(+)(c) -> p pi(0) using Lambda(+)(c)(Lambda) over bar (-)(c) pairs produced by e(+)e(-) collisions at a center-of-mass energy of root s = 4.6 GeV. The data sample was collected by the BESIII detector at the BEPCII collider and corresponds to an integrated luminosity of 567 pb(-1). We find the first evidence for the decay Lambda(+)(c) -> p eta with a statistical significance of 4.2 sigma and measure its branching fraction to be B(Lambda(+)(c) -> p eta) = (1.24 +/- 0.28(stat) +/- 0.10(sys)) x 10(-3). No significant Lambda(+)(c) -> p pi(0) signal is observed. We set an upper limit on its branching fraction B(Lambda(+…
Measurement of the Absolute Branching Fraction of the Inclusive Decay Λc+ → Λ+X
2018
Physical review letters 121(6), 062003 (2018). doi:10.1103/PhysRevLett.121.062003
Precision Measurement of the e+e−→Λc+Λ¯c− Cross Section Near Threshold
2018
The cross section of the e(+)e(-) -> Lambda(+)(c)(Lambda) over bar (-)(c) process is measured with unprecedented precision using data collected with the BESIII detector at root s = 4574.5, 4580.0, 4590.0 and 4599.5 MeV. The nonzero cross section near the Lambda(+)(c)(Lambda) over bar (-)(c) production threshold is cleared. At center-of-mass energies root s = 4574.5 and 4599.5 MeV, the higher statistics data enable us to measure the Lambda(c) polar angle distributions. From these, the.c electric over magnetic form-factor ratios (vertical bar G(E)/G(M)vertical bar) are measured for the first time. They are found to be 1.14 +/- 0.14 +/- 0.07 and 1.23 +/- 0.05 +/- 0.03, respectively, where the …