scholarly journals Study of four-lepton final states in electron-positron interactions at 29 GeV

1989 ◽  
Author(s):  
A. Petradza
Keyword(s):  
Final States ◽  
Electron Positron

scholarly journals RECENT τ LEPTON RESULTS FROM BABAR

2014 ◽  
Vol 35 ◽  
pp. 1460440
Author(s):  
ALBERTO LUSIANI
Keyword(s):  
Standard Model ◽  
Branching Fractions ◽  
Charged Particles ◽  
Babar Collaboration ◽  
Final States ◽  
Final State ◽  
Experimental Knowledge ◽  
Electron Positron ◽  
The Standard Model ◽  
Positron Collisions

We report recent measurements on τ leptons obtained by the BABAR collaboration using the entire recorded sample of electron-positron collisions at and around the Υ(4S) (about 470fb-1). The events were recorded at the PEP-II asymmetric collider at the SLAC National Accelerator Laboratory. The measurements include high multiplicity τ decay branching fractions with 3 or 5 charged particles in the final state, a search for the second class current the τ decay τ → πη′ν, τ branching fractions into final states containing two KS mesons, [Formula: see text], with h = π, K, and preliminary measurements of hadronic spectra of τ decays with three hadrons (τ- → h-h+h-ντ decays, where h = π, K). The results improve the experimental knowledge of the τ lepton properties and can be used to improve the precision tests of the Standard Model.

scholarly journals Measuring masses in semi-invisible final states at electron-positron colliders

2017 ◽  
Vol 95 (7) ◽  
Author(s):  
Qian-Fei Xiang ◽  
Xiao-Jun Bi ◽  
Qi-Shu Yan ◽  
Peng-Fei Yin ◽  
Zhao-Huan Yu
Keyword(s):  
Final States ◽  
Electron Positron

scholarly journals Prospects for rare and forbidden hyperon decays at BESIII

2017 ◽  
Vol 12 (5) ◽  
Author(s):  
Hai-Bo Li
Keyword(s):  
Rare Decays ◽  
Branching Fractions ◽  
Center Of Mass ◽  
Final States ◽  
Electron Spectrometer ◽  
Mass Energy ◽  
Measurement Sensitivity ◽  
Center Of Mass Energy ◽  
Electron Positron ◽  
Hyperon Decays

Abstract The study of hyperon decays at the Beijing Electron Spectrometer III (BESIII) is proposed to investigate the events of J/ψ decay into hyperon pairs, which provide a pristine experimental environment at the Beijing Electron–Positron Collider II. About 106–108 hyperons, i.e., Λ, Σ, Ξ, and Ω, will be produced in the J/ψ and ψ(2S) decays with the proposed data samples at BESIII. Based on these samples, the measurement sensitivity of the branching fractions of the hyperon decays is in the range of 10−5–10−8. In addition, with the known center-of-mass energy and “tag technique”, rare decays and decays with invisible final states can be probed.

Hadron reactions study with the CMD-3 detector in e+e− collisions

2016 ◽  
Vol 31 (33) ◽  
pp. 1630038
Author(s):  
E. P. Solodov ◽  
A. N. Amirkhanov ◽  
A. V. Anisenkov ◽  
V. M. Aulchenko ◽  
V. S. Banzarov ◽  
...  
Keyword(s):  
Energy Range ◽  
Invariant Mass ◽  
Energy Dependence ◽  
Cross Section ◽  
Cross Sections ◽  
Final States ◽  
Preliminary Results ◽  
Mass Distributions ◽  
Electron Positron ◽  
Intermediate States

The CMD-3 detector has been taking data since December 2010 at the VEPP-2000 electron–positron collider. The collected data sample corresponds to about 60 inverse picobarn of integrated luminosity in the c.m. energy range from 0.32 GeV to 2.0 GeV. Preliminary results of the analysis of various hadronic cross-sections, in particular, [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], 3[Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] are presented. The processes with multi-hadron final states have several intermediate states which have to be taken into account to correctly describe the angular and invariant mass distributions, as well as cross-section energy dependence.

scholarly journals A Monte Carlo program for generating hadronic final states in electron-positron annihilations

1985 ◽  
Vol 34 (4) ◽  
pp. 371-385 ◽  
Author(s):  
L. Angelini ◽  
L. Nitti ◽  
M. Pellicoro ◽  
G. Preparata ◽  
G. Valenti
Keyword(s):  
Monte Carlo ◽  
Final States ◽  
Monte Carlo Program ◽  
Electron Positron ◽  
Hadronic Final States

Total cross section for electron-positron annihilation into hadron final states in the upsilon energy region

1984 ◽  
Vol 29 (7) ◽  
pp. 1285-1299 ◽  
Author(s):  
R. Giles ◽  
J. Hassard ◽  
M. Hempstead ◽  
K. Kinoshita ◽  
W. W. MacKay ◽  
...  
Keyword(s):  
Total Cross Section ◽  
Positron Annihilation ◽  
Cross Section ◽  
Energy Region ◽  
Final States ◽  
Electron Positron Annihilation ◽  
Electron Positron

MEASUREMENT OF TAU DECAYS INTO KAONS AT BABAR AND DETERMINATION OF |Vus|

2011 ◽  
Vol 26 (03n04) ◽  
pp. 712-714
Author(s):  
◽  
ALEKSANDRA ADAMETZ
Keyword(s):  
Matrix Element ◽  
Systematic Error ◽  
Positron Annihilation ◽  
Final States ◽  
Tau Decays ◽  
Electron Positron Annihilation ◽  
Electron Positron ◽  
Systematic Effects ◽  
Babar Detector

We present recent measurements of τ decays into final states with kaons, which are based on several hundred million τ+τ- pairs produced in electron-positron annihilation data collected with the BABAR detector. These measurements can be used to determine the Cabibbo-Kobayashi-Maskawa matrix element |Vus| with a tiny systematic error and in two different methods affected by different systematic effects.

Sign in / Sign up

Export Citation Format

Share Document