Comments on Charmed Baryon Pair Production in E+e--annihilation

Comments on Charmed Baryon Pair Production in E+e--annihilation PDF Author: J. G. Körner
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ISBN:
Category :
Languages : en
Pages : 4

Book Description

Review of Charmed Baryons in Ee− Annihilation

Review of Charmed Baryons in Ee− Annihilation PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

Book Description
A resonance is observed in pK−.pi., anti pK.pi.−, pK/sub S/° and anti pK/sub S/° invariant-mass spectra at 2.285 +- 0.006 GeV/c2 which is associated with the lowest-lying charmed baryon (.lambda./sub c/). The Dalitz plot and limits on other modes and on the production of other states are presented. Measurements of inclusive p and .lambda. cross sections are also presented and allow an estimate of the branching ratios B(.lambda./sub c//sup +/ .-->. pK−.pi./sup +/) = (2.2 +- 1.0)% and B(.lambda./sub c//sup +/.-->. p anti K°) = (1.1 +- 0.7)%.

Charmed and Strange Baryon Production in 29 GeV Electron Positron Annihilation

Charmed and Strange Baryon Production in 29 GeV Electron Positron Annihilation PDF Author: Spencer Robert Klein
Publisher:
ISBN:
Category : Baryons
Languages : en
Pages : 119

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Energy Research Abstracts

Energy Research Abstracts PDF Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 1080

Book Description

INIS Atomindeks

INIS Atomindeks PDF Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1210

Book Description

Proceedings

Proceedings PDF Author:
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ISBN:
Category : Nuclear reactions
Languages : en
Pages : 1058

Book Description

Proceedings, 1977 International Symposium on Lepton and Photon Interactions at High Energies

Proceedings, 1977 International Symposium on Lepton and Photon Interactions at High Energies PDF Author:
Publisher:
ISBN:
Category : Lepton interactions
Languages : en
Pages : 1060

Book Description

Charmed Baryon Decays Observed in E/e± Annihilation at SPEAR

Charmed Baryon Decays Observed in E/e± Annihilation at SPEAR PDF Author: Eric Nelson Vella
Publisher:
ISBN:
Category :
Languages : en
Pages : 256

Book Description

Charmed Baryon Decays Observed in Ee− Annihilation at SPEAR.

Charmed Baryon Decays Observed in Ee− Annihilation at SPEAR. PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

Book Description
Various weak decays of the charmed baryon ..lambda../sub c/ are observed in the Mark II detector at the SLAC ee− storage ring SPEAR. Hadronic decays ..lambda../sub c/ ..-->.. pK−..pi..+ and ..lambda../sub c/+ ..-->.. pK/sub s/° and their conjugates are observed as peaks in invariant mass spectra at m(..lambda../sub c/) = (2286 +- 6) MeV/c2. An estimate of the charmed baryon production cross section, sigma(..lambda../sub c/) + sigma (anti ..lambda../sub c/) = (1.7 +- 0.4) nb, derived from Mark II measurements of the inclusive baryon cross sections R/sub p/ and R/sub ..lambda../ as functions of center-of-mass energy, is used to calculate branching ratios for these hadronic decays: BR (..lambda../sub c/+ ..-->.. p K− ..pi..+) = (2.0 +- 0.8)%; BR (..lambda../sub c//sup +/ ..-->.. p k/sub s/°)/BR (..lambda../sub c//sup +/ ..-->.. p K− ..pi../sup +/) = (36 +- 16)%. An attempt is also made to observe higher mass charmed baryons by reconstructing cascade decays ..sigma../sub c/ ..-->.. ..lambda../sub c/..pi ... Evidence for the observation of semileptonic decays of the charmed baryon is presented. Direct electrons are observed in events containing antiprotons, lambdas and antilambdas. The number of electrons per baryon event, after background subtraction and efficiency correction, is used, together with an estimate of the charmed baryon content of proton and lambda events, to calculate inclusive and semi-inclusive semileptonic branching ratios of the ..lambda../sub c.

High Energy Physics Index

High Energy Physics Index PDF Author:
Publisher:
ISBN:
Category : Particles (Nuclear physics)
Languages : en
Pages : 632

Book Description

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