Direct Measurement of Charmed D+ and D0 Semileptonic Branching Ratios

Baltrusaitis, R. M.; Becker, J. J.; Blaylock, G. T.; Brown, J. S.; Bunnell, K. O.; Burnett, T. H.; Cassell, R. E.; Coffman, D.; Cook, V.; Coward, D. H.; Dado, S.; Del Papa, C.; Dorfan, D. E.; Dubois, G. P.; Duncan, A. L.; Einsweiler, K. F.; Eisenstein, B. I.; Fabrizio, R.; Gladding, G.; Grancagnolo, F.; Hamilton, R. P.; Hauser, J.; Heusch, C. A.; Hitlin, D. G.; Koepke, L.; Lockman, W. S.; Mockett, P. M.; Moss, L.; Mozley, R. F.; Nappi, A.; Odian, A.; Partridge, R.; Perrier, J.; Plaetzer, S. A.; Richman, J. D.; Roehrig, J. R.; Russell, J. J.; Sadrozinski, H. W.; Scarlatella, M.; Schalk, T. L.; Schindler, R. H.; Seiden, A.; Sleeman, J. C.; Spadafora, A. L.; Thaler, J. J.; Toki, W.; Tripsas, B.; Villa, F.; Wattenberg, A.; Weinstein, A. J.; Wermes, N.; Willutzki, H. J.; Wisinski, D. E.; Wisniewski, W. J.

doi:10.1103/physrevlett.54.1976

Direct Measurement of Charmed D⁺ and D⁰ Semileptonic Branching Ratios

Journal Article · Mon May 06 00:00:00 EDT 1985 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.54.1976· OSTI ID:1447786

Baltrusaitis, R. M.; Becker, J. J.; Blaylock, G. T.; Brown, J. S.; Bunnell, K. O.; Burnett, T. H.; Cassell, R. E.; Coffman, D.; Cook, V.; Coward, D. H.; Dado, S.; Del Papa, C.; Dorfan, D. E.; Dubois, G. P.; Duncan, A. L.; Einsweiler, K. F.; Eisenstein, B. I.; Fabrizio, R.; Gladding, G.; Grancagnolo, F. more »

Measurements of the semileptonic branching ratios of charmed D⁺ and D⁰ mesons are presented, from data collected at the ψ(3770) in the Mark III detector at SPEAR. From a sample of events kinematically selected as charmed D⁺D^- or D⁰ D^-0 pairs, the branching ratios R(D⁺ → e⁺ + X) = (17.0 ± 1.9 ± 0.7)% and R(D⁰ → e⁺ + X) = ( 7.5 ± 1.1 ± 0.4)% are obtained. The ratio of these measurements can be interpreted as the ratio of D⁺ and D⁰ lifetimes $$\frac{τ^+}{τ^0}$$ = $$2.3^{+0.5+0.1}_{-0.4-0.1}$$ by neglect of the contribution of Cabibbo-suppressed decays to the total decay width.

View Accepted Manuscript (DOE)

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: Mark III Collaboration

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1447786

Alternate ID(s):: OSTI ID: 5692029

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 54; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Exclusive semileptonic decays of heavy mesons Wirbel, M.; Stech, B.; Bauer, M. Zeitschrift für Physik C Particles and Fields, Vol. 29, Issue 4 https://doi.org/10.1007/bf01560299	journal	December 1985
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Production ofμ − e + pairs in neutrino interactions in the SKAT bubble chamber experiment Ammosov, V. V.; Hleborad, V. I.; Ivanilov, A. A. Zeitschrift für Physik C Particles and Fields, Vol. 35, Issue 3 https://doi.org/10.1007/bf01570768	journal	September 1987
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Lifetimes, cross sections, and production mechanisms of charmed particles produced by 20-GeV photons Abe, K.; Armenteros, R.; Bacon, T. C. Physical Review D, Vol. 33, Issue 1 https://doi.org/10.1103/physrevd.33.1	journal	January 1986
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Investigation of the total charm-pair cross section in nonresonant e + e − annihilations at √s =10.5 GeV Bowcock, T.; Kinoshita, K.; Pipkin, F. M. Physical Review D, Vol. 38, Issue 9 https://doi.org/10.1103/physrevd.38.2679	journal	November 1988
Inclusive charged- D / e m p h > production in 205-GeV/ c π − Be interactions Mooney, P.; Sarmiento, M.; Bishop, J. M. Physical Review D, Vol. 39, Issue 9 https://doi.org/10.1103/physrevd.39.2494	journal	May 1989
Inclusive neutral- D production in 205-GeV/ c π − Be interactions Sarmiento, M.; Mooney, P.; Bishop, J. M. Physical Review D, Vol. 45, Issue 7 https://doi.org/10.1103/physrevd.45.2244	journal	April 1992
Rapidity distributions of dileptons from a hadronizing quark-gluon plasma Vogt, R.; Jacak, B. V.; McGaughey, P. L. Physical Review D, Vol. 49, Issue 7 https://doi.org/10.1103/physrevd.49.3345	journal	April 1994
τ Leptonic Branching Ratios and a Search for Goldstone-Boson Decay Baltrusaitis, R. M.; Becker, J. J.; Blaylock, G. T. Physical Review Letters, Vol. 55, Issue 18 https://doi.org/10.1103/physrevlett.55.1842	journal	October 1985
Characteristics of Charm Production by 400-GeV Protons Duffy, M. E.; Fanourakis, G. K.; Loveless, R. J. Physical Review Letters, Vol. 57, Issue 13 https://doi.org/10.1103/physrevlett.57.1522	journal	September 1986
Comprehensive analysis of data pertaining to the weak neutral current and the intermediate-vector-boson masses Amaldi, Ugo; Böhm, Albrecht; Durkin, L. S. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2017-03426	text	January 1987

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