Author: Juliana WhitmorePublisher:
ISBN:
Category :
Languages : en
Pages : 406
Book Description
A Precision Measurement of the Tau Lifetime
Author: Juliana WhitmoreMeasurement of the Tau Lifetime
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
If the tau lepton couples to the charged weak current with universal strength, its lifetime can be expressed in terms of the muon's lifetime, the ratio of the masses of the muon and the tau, and the tau's branching ratio into e anti nu/sub e/ nu/sub tau/ as tau/sub tau/ = tau/sub .mu./ (m/sub .mu.//m/sub tau/)5 B(tau .-->. e anti nu/sub e[nu]sub tau/) = 2.8 +- 0.2 x 10−13 s. This paper describes the measurement of the tau lifetime made by the Mark II collaboration, using a new high precision drift chamber in contunction with the Mark II detector at PEP. The results of other tau lifetime measurements are summarized.
A Precise Measurement of the Tau Lifetime
Author: Robert Francis HarrPrecision Measurement of the Tau Lepton Mass and the Mass Difference of the Positively and Negatively Charged Tau Leptons at BaBar
Author: Parker LundUpdated Measurement of the Tau Lifetime at SLD.
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We present an updated measurement of the tau lifetime at SLD. 4316[tau]-pair events, selected from a 150k Z[sup 0] data sample, are analyzed using three techniques: decay length, impact parameter, and impact parameter difference methods. The measurement benefits from the small and stable interaction region at the SLC and the precision CCD pixel vertex detector of the SLD. The combined result is:[tau][sub[tau]]= 288.1[+-] 6.1(stat)[+-] 3.3(syst) fs.
Precision Measurement of the 40+ Lifetime
Author: Richard Alan LundyPublisher:
ISBN:
Category : Mesons
Languages : en
Pages : 1696
Book Description
Precision Measurements of Tau Lepton Decays
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 293
Book Description
Using data collected with the BABAR detector at the SLAC PEP-II electron-positron storage ring operating at a centre-of-mass energy near 10.58 GeV, the branching fractions B([tau]- 2![pi]-[pi]-[pi]+[nu][tau]) =(8.83±0.01±0.13)%, B([tau]- 2!K-[pi]-[pi]+[nu][tau]) =(0.273± 0.002 ± 0.009)%, B([tau]- 2!K-[pi]-K+[nu][tau]) =(0.1346 ± 0.0010 ± 0.0036)%, and B([tau]- 2!K-K-K+[nu][tau]) =(1.58 ± 0.13 ± 0.12) × 10-5 are measured where the uncertainties are statistical and systematic, respectively. The invariant mass distribution for the [tau]- 2![pi]-[pi]-[pi]+[nu][tau], [tau]- 2!K-[pi]-[pi]+[nu][tau], [tau]- 2!K-[pi]-K+[nu][tau] and [tau]- 2!K-K-K+[nu][tau] decays are unfolded to correct for detector effects. A measurement of B([tau]- 2![phi][pi]-[nu][tau]) =(3.42±0.55±0.25)×10-5, a measurement of B([tau]- 2![phi]K-[nu][tau]) =(3.39±0.20±0.28)× 10-5 and an upper limit on B([tau]- 2!K-K-K+[nu][tau] [ex.[phi]]) d"2.5 × 10-6@90%CL are determined from a binned maximum likelihood fit of the [tau]- 2!K-[pi]-K+[nu][tau] and [tau]- 2!K-K-K+[nu][tau] K+K- invariant mass distributions. The branching ratio B([tau]-2!-[nu][tau])/ B([tau]-2!pi]-[nu][tau]) is measured to be (6.531±0.056±0.093)×10-2 from which.
Precision Measurements of Tau Lepton Decays Using Inclusive Spectra
Author: Sterling Gray WatsonPublisher:
ISBN:
Category : Leptons (Nuclear physics)
Languages : en
Pages : 286
Book Description
Symmetry And Spin In Standard Model - Proceedings Of The Seventh Lake Louise Winter Institute
Author: Faqir C KhannaPublisher: World Scientific
ISBN: 9814554685
Category :
Languages : en
Pages : 450
Book Description
The subject of this Institute is the importance of Spin and Symmetry measurements in probing the Standard Model and QCD, polarization in lepton-quark interactions, nucleon spin structure functions, spin effects in high energy hadronic interactions, and electromagnetic spin physics at medium energies.The pedagogical nature of the invited talks makes this book suitable for senior graduate students and subatomic physicists in general, while the specialist talks make the volume useful to practitioners in the field.
Author: Dante Eric Amidei