Measurement of branching fractions of singly Cabibbo-suppressed decays <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi mathvariant="normal">Λ</mml:mi><mml:mi>c</mml:mi><mml:mo>+</mml:mo></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi mathvariant="normal">Σ</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="…
نویسندگان
چکیده
Based on a sample of 4.4 $\mathrm{fb}^{-1}$ $e^{+}e^{-}$ annihilation data collected in the energy region between 4.6 GeV and 4.7 with BESIII detector at BEPCII, two singly Cabibbo-suppressed decays $\Lambda_c^+ \rightarrow \Sigma^0 K^+$ $\Lambda_{c}^{+} \Sigma^+ K_{S}^0$ are studied. The ratio branching fraction $\mathcal{B}(\Lambda_c^+ K^+)$ relative to \pi^+)$ is measured be $0.0361 \pm 0.0073(\mathrm{stat.}) 0.0005(\mathrm{syst.})$, K_{S}^0)$ $\mathcal{B}(\Lambda_{c}^{+} \pi^+ \pi^-)$ $0.0106 0.0031(\mathrm{stat.}) 0.0004(\mathrm{syst.})$. After taking world-average fractions reference decay channels, determined $(4.7\pm 0.9(\mathrm{stat.})\pm 0.1(\mathrm{syst.}) 0.3(\mathrm{ref.}))\times10^{-4}$ $(4.8\pm 1.4(\mathrm{stat.})\pm 0.2(\mathrm{syst.}) 0.3(\mathrm{ref.}))\times10^{-4}$, respectively. for first time.
منابع مشابه
Measurement of Branching Fractions in τ Decays
Full LEP-I data collected by the ALEPH detector during 1991-1995 running are analyzed in order to measure the τ decay branching fractions. The analysis follows the global method used in the published study based on 1991-1993 data, with several improvements, especially concerning the treatment of photons and π’s. Extensive systematic studies are performed, in order to match the large statistics ...
متن کاملCabibbo-allowed and Doubly Cabibbo Suppressed D → Kπ Decays
For over two decades, the D → Kπ has served as a workhorse in charm and beauty physics. However, there is general interest in measuring all the D → Kπ branching fractions. In particular, while it is often assumed that B(D → K Sπ) = B(D → K Lπ), interference between D → Kπ and D → K0π can break this equality. Although this asymmetry is expected, measuring it has alluded experiments because of th...
متن کاملD Mixing and Cabibbo Suppressed Decays
The CLEO collaboration reported observation of the ‘wrong sign’ decay D → Kπ in 1993. Upgrades have been made to the CLEO detector , including installation of a silicon vertex detector, which provide substantial improvements in sensitivity to D→Kπ. The vertex detector enables the reconstruction of the proper lifetime of the D, and so provides sensitivity to D−D mixing. We will give preliminary ...
متن کاملNew Physics and CP Violation in Singly Cabibbo Suppressed D Decays
We analyze various theoretical aspects of CP violation in singly Cabibbo suppressed (SCS) Dmeson decays, such as D → KK,ππ. In particular, we explore the possibility that CP asymmetries will be measured close to the present level of experimental sensitivity of O(10−2). Such measurements would signal new physics. We make the following points: (i) The mechanism at work in neutral D decays could b...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical review
سال: 2022
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.106.052003