C. Akerlof

Study of inclusive production in e+e- annihilations at 29 GeV

Cross sections are presented for the inclusive production of {Lambda} hyperons in electron-positron annihilations at {radical}{ital s} =29 GeV based on the full 291-pb{sup {minus}1} sample of data taken in the High Resolution Spectrometer experiment at the SLAC {ital e}{sup +}{ital e}{minus} storage ring PEP. These results, and the associated correlation analyses, are consistent with the Lund model predictions with the strange diquark suppression ratio {delta} fixed at 0.59{plus minus}0.10{plus minus}0.18, as compared to the standard Lund value of 0.32. The {Lambda} multiplicity has been found to be 0.182{plus minus}0.020 per event. The opposite-strangeness multiplicity {l angle}{ital n}{sub {Lambda}}{Lambda}{bar a}{r angle} has been measured to be 0.046{plus minus}0.020, whereas the like-strangeness multiplicity {l angle}{ital n}{sub {Lambda}{Lambda}}+{bar {Lambda}}{bar {Lambda}}{r angle} is 0.009{plus minus}0.028. A strong correlation is found between {Lambda}s and {bar {Lambda}} s; when one is found in an event, the other is found in the same event with a probability that exceeds 50%.

Study of inclusive. Lambda. production in e sup + e minus annihilations at 29 GeV

Cross sections are presented for the inclusive production of {Lambda} hyperons in electron-positron annihilations at {radical}{ital s} =29 GeV based on the full 291-pb{sup {minus}1} sample of data taken in the High Resolution Spectrometer experiment at the SLAC {ital e}{sup +}{ital e}{minus} storage ring PEP. These results, and the associated correlation analyses, are consistent with the Lund model predictions with the strange diquark suppression ratio {delta} fixed at 0.59{plus minus}0.10{plus minus}0.18, as compared to the standard Lund value of 0.32. The {Lambda} multiplicity has been found to be 0.182{plus minus}0.020 per event. The opposite-strangeness multiplicity {l angle}{ital n}{sub {Lambda}}{Lambda}{bar a}{r angle} has been measured to be 0.046{plus minus}0.020, whereas the like-strangeness multiplicity {l angle}{ital n}{sub {Lambda}{Lambda}}+{bar {Lambda}}{bar {Lambda}}{r angle} is 0.009{plus minus}0.028. A strong correlation is found between {Lambda}s and {bar {Lambda}} s; when one is found in an event, the other is found in the same event with a probability that exceeds 50%.

Study of inclusiveΛproduction ine+e−annihilations at 29 GeV

Cross sections are presented for the inclusive production of {Lambda} hyperons in electron-positron annihilations at {radical}{ital s} =29 GeV based on the full 291-pb{sup {minus}1} sample of data taken in the High Resolution Spectrometer experiment at the SLAC {ital e}{sup +}{ital e}{minus} storage ring PEP. These results, and the associated correlation analyses, are consistent with the Lund model predictions with the strange diquark suppression ratio {delta} fixed at 0.59{plus minus}0.10{plus minus}0.18, as compared to the standard Lund value of 0.32. The {Lambda} multiplicity has been found to be 0.182{plus minus}0.020 per event. The opposite-strangeness multiplicity {l angle}{ital n}{sub {Lambda}}{Lambda}{bar a}{r angle} has been measured to be 0.046{plus minus}0.020, whereas the like-strangeness multiplicity {l angle}{ital n}{sub {Lambda}{Lambda}}+{bar {Lambda}}{bar {Lambda}}{r angle} is 0.009{plus minus}0.028. A strong correlation is found between {Lambda}s and {bar {Lambda}} s; when one is found in an event, the other is found in the same event with a probability that exceeds 50%.

Measurement of the branching ratio for the decayτ−→e−ν¯eντ

This paper reports a new measurement of the branching ratio for the decay {tau}{sup {minus}}{r arrow}{ital e}{sup {minus}}{bar {nu}}{sub {ital e}}{nu}{sub {tau}}. The data were taken with the High Resolution Spectrometer at the SLAC {ital {ital e}}{sup +}{ital e}{sup {minus}} colliding-beam facility PEP, operating at {radical}{ital s}=29 GeV. The result {ital B}({tau}{sup {minus}}{r arrow}{ital e}{sup {minus}}{bar {nu}}{sub {ital e}}{nu}{sub {tau}})=(17.0{plus minus}0.5{plus minus}0.5)%, together with our measurements of the lifetime and the topological branching fractions of the {tau} lepton are compared with theoretical expectations.

Measurement of the branching ratio for the decay. tau. sup minus r arrow e sup minus. nu. sub e. nu. sub. tau

This paper reports a new measurement of the branching ratio for the decay {tau}{sup {minus}}{r arrow}{ital e}{sup {minus}}{bar {nu}}{sub {ital e}}{nu}{sub {tau}}. The data were taken with the High Resolution Spectrometer at the SLAC {ital {ital e}}{sup +}{ital e}{sup {minus}} colliding-beam facility PEP, operating at {radical}{ital s}=29 GeV. The result {ital B}({tau}{sup {minus}}{r arrow}{ital e}{sup {minus}}{bar {nu}}{sub {ital e}}{nu}{sub {tau}})=(17.0{plus minus}0.5{plus minus}0.5)%, together with our measurements of the lifetime and the topological branching fractions of the {tau} lepton are compared with theoretical expectations.

Measurement of the branching ratio for the decay -'e-»e

This paper reports a new measurement of the branching ratio for the decay {tau}{sup {minus}}{r arrow}{ital e}{sup {minus}}{bar {nu}}{sub {ital e}}{nu}{sub {tau}}. The data were taken with the High Resolution Spectrometer at the SLAC {ital {ital e}}{sup +}{ital e}{sup {minus}} colliding-beam facility PEP, operating at {radical}{ital s}=29 GeV. The result {ital B}({tau}{sup {minus}}{r arrow}{ital e}{sup {minus}}{bar {nu}}{sub {ital e}}{nu}{sub {tau}})=(17.0{plus minus}0.5{plus minus}0.5)%, together with our measurements of the lifetime and the topological branching fractions of the {tau} lepton are compared with theoretical expectations.