K. s. kekelidze - Open Access .click

Results 51 to 60 of about 27,084,526 (141)

Improved calorimetric particle identification in NA62 using machine learning techniques

Journal of High Energy Physics, 2023
Measurement of the ultra-rare K + → π + ν ν ¯ $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $$ decay at the NA62 experiment at CERN requires high-performance particle identification to distinguish muons from pions.
The NA62 collaboration +234 more
doaj +1 more source

A measurement of the K + → π + μ + μ − decay

Journal of High Energy Physics, 2022
A sample of 2.8 × 104 K + → π + μ + μ − candidates with negligible background was collected by the NA62 experiment at the CERN SPS in 2017–2018. The model-independent branching fraction is measured to be (9.15 ± 0.08) × 10 −8, a factor three more precise
The NA62 collaboration +209 more
doaj +1 more source

Observation of B-s(0)-> K+K- and measurements of branching fractions of charmless two-body decays of B-0 and B-s(0) mesons in pp collisions at root s=1.96 TeV [PDF]

, 2006
We search for decays of the type B-(s)(0)-> h(+)h('-) (where h,h(')=K or pi) in 180 pb(-1) of (p) over barp collisions collected at the Tevatron by the upgraded Collider Detector at Fermilab.
A. Mitra +999 more
core +1 more source

First Observation of B-s(0)->(DsK -/+)-K-+/- and Measurement of the Ratio of Branching Fractions B(B-s(0)->(DsK -/+)-K-+/-)/B(B-s(0)-> D-s(+)pi(-)) [PDF]

, 2009
A combined mass and particle identification fit is used to make the first observation of the decay B-s(0)->(DsK -/+)-K-+/- and measure the branching fraction of B-s(0)->(DsK -/+)-K-+/- relative to B-s(0)-> D-s(+)pi(-).
A. Mitra +999 more
core +1 more source

Performance of the NA62 trigger system

Journal of High Energy Physics, 2023
The NA62 experiment at CERN targets the measurement of the ultra-rare K + → π + ν ν ¯ $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $$ decay, and carries out a broad physics programme that includes probes for symmetry violations and searches for exotic ...
The NA62 collaboration +209 more
doaj +1 more source

Search for rare decays $B^{+} \to D_{s}^{(\ast)+}\eta$, $D_{s}^{(\ast)+}\bar{K}^{0}$, $D^{+}\eta$, and $D^{+}K^{0}$

, 2023
7 pages, 2 figuresInternational audienceWe present a study of rare decay modes $B^{+} \to D_{s}^{+}h^{0}$, $B^{+} \to D_{s}^{\ast+}h^{0}$, and $B^{+} \to D^{+}h^{0}$, where $h^{0}$ denotes the neutral mesons $\eta$ or $K^{0}$, using a data sample of ...
Borah, J. +242 more
core +1 more source

Searches for lepton number violating K+ decays

Physics Letters B, 2019
The NA62 experiment at CERN reports a search for the lepton number violating decays K+→π−e+e+ and K+→π−μ+μ+ using a data sample collected in 2017. No signals are observed, and upper limits on the branching fractions of these decays of 2.2×10−10 and 4.2 ...
E. Cortina Gil +198 more
doaj +1 more source

Measurements of K S 0 $$ {K}_S^0 $$ - K L 0 $$ {K}_L^0 $$ asymmetries in the decays Λ c + → p K L , S 0 $$ {\Lambda}_c^{+}\to p{K}_{L,S}^0 $$ , p K L , S 0 π + π − $$ p{K}_{L,S}^0{\pi}^{+}{\pi}^{-} $$ and p K L , S 0 π 0 $$ p{K}_{L,S}^0{\pi}^0 $$

Using e + e − annihilation data sets corresponding to an integrated luminosity of 4.5 fb −1, collected with the BESIII detector at center-of-mass energies between 4.600 and 4.699 GeV, we report the first measurements of the absolute branching fractions B
Yao, Z. P. +999 more
core +1 more source

Measurement of the branching fractions of $$ \overline{B} $$ → D(*)K−$$ {K}_{(S)}^{\left(\ast \right)0} $$ and $$ \overline{B} $$ → D(*)$$ {D}_s^{-} $$ decays at Belle II [PDF]

We present measurements of the branching fractions of eight B0 → D(∗)+K-K(∗)0(S), B- → D(∗)0 K− K(*)0(S) decay channels. The results are based on data from SuperKEKB electron-positron collisions at the Y(4S) resonance collected with the Belle II detector,
C. Lemettais +836 more
core +1 more source

Amplitude analysis and branching fraction measurement of D+s → K+K− π +

, 2021
We report an amplitude analysis and branching fraction measurement of D+- s → K+K−π+- decay using a data sample of 3.19 fb−1 recorded with BESIII detector at a center-of-mass energy of 4.178 GeV.
M. Fritsch +485 more
core +1 more source

astrophysics
fixed target experiments
physics

rare decay
beyond standard model
branching fraction

flavour changing neutral currents
flavour physics
a. a. dmitrievsky