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Title: Absolute Branching Fraction Measurements for D{sup +} and D{sup 0} Inclusive Semileptonic Decays

Abstract

We present measurements of the inclusive branching fractions for the decays D{sup +}{yields}Xe{sup +}{nu}{sub e} and D{sup 0}{yields}Xe{sup +}{nu}{sub e}, using 281 pb{sup -1} of data collected on the {psi}(3770) resonance with the CLEO-c detector. We find B(D{sup 0}{yields}Xe{sup +}{nu}{sub e})=(6.46{+-}0.17{+-}0.13)% and B(D{sup +}{yields}Xe{sup +}{nu}{sub e})=(16.13{+-}0.20{+-}0.33)%. Using the known D meson lifetimes, we obtain the ratio {gamma}{sub D{sup +}}{sup sl}/{gamma}{sub D{sup 0}}{sup sl}=0.985{+-}0.028{+-}0.015, confirming isospin invariance at the level of 3%. The positron momentum spectra from D{sup +} and D{sup 0} have consistent shapes.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1]
  1. Cornell University, Ithaca, New York 14853 (United States) (and others)
Publication Date:
OSTI Identifier:
20861512
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 97; Journal Issue: 25; Other Information: DOI: 10.1103/PhysRevLett.97.251801; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRANCHING RATIO; CESR STORAGE RING; D NEUTRAL MESONS; D PLUS MESONS; ELECTRON NEUTRINOS; ISOSPIN; LIFETIME; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PARTICLE PRODUCTION; POSITRONS; PSI-3770 MESONS; SEMILEPTONIC DECAY

Citation Formats

Adam, N. E., Alexander, J. P., Berkelman, K., Cassel, D. G., Duboscq, J. E., Ecklund, K. M., Ehrlich, R., Fields, L., Gibbons, L., Gray, R., Gray, S. W., Hartill, D. L., Heltsley, B. K., Hertz, D., Jones, C. D., Kandaswamy, J., Kreinick, D. L., Kuznetsov, V. E., Mahlke-Krueger, H., and Meyer, T. O. Absolute Branching Fraction Measurements for D{sup +} and D{sup 0} Inclusive Semileptonic Decays. United States: N. p., 2006. Web. doi:10.1103/PHYSREVLETT.97.251801.
Adam, N. E., Alexander, J. P., Berkelman, K., Cassel, D. G., Duboscq, J. E., Ecklund, K. M., Ehrlich, R., Fields, L., Gibbons, L., Gray, R., Gray, S. W., Hartill, D. L., Heltsley, B. K., Hertz, D., Jones, C. D., Kandaswamy, J., Kreinick, D. L., Kuznetsov, V. E., Mahlke-Krueger, H., & Meyer, T. O. Absolute Branching Fraction Measurements for D{sup +} and D{sup 0} Inclusive Semileptonic Decays. United States. doi:10.1103/PHYSREVLETT.97.251801.
Adam, N. E., Alexander, J. P., Berkelman, K., Cassel, D. G., Duboscq, J. E., Ecklund, K. M., Ehrlich, R., Fields, L., Gibbons, L., Gray, R., Gray, S. W., Hartill, D. L., Heltsley, B. K., Hertz, D., Jones, C. D., Kandaswamy, J., Kreinick, D. L., Kuznetsov, V. E., Mahlke-Krueger, H., and Meyer, T. O. Fri . "Absolute Branching Fraction Measurements for D{sup +} and D{sup 0} Inclusive Semileptonic Decays". United States. doi:10.1103/PHYSREVLETT.97.251801.
@article{osti_20861512,
title = {Absolute Branching Fraction Measurements for D{sup +} and D{sup 0} Inclusive Semileptonic Decays},
author = {Adam, N. E. and Alexander, J. P. and Berkelman, K. and Cassel, D. G. and Duboscq, J. E. and Ecklund, K. M. and Ehrlich, R. and Fields, L. and Gibbons, L. and Gray, R. and Gray, S. W. and Hartill, D. L. and Heltsley, B. K. and Hertz, D. and Jones, C. D. and Kandaswamy, J. and Kreinick, D. L. and Kuznetsov, V. E. and Mahlke-Krueger, H. and Meyer, T. O.},
abstractNote = {We present measurements of the inclusive branching fractions for the decays D{sup +}{yields}Xe{sup +}{nu}{sub e} and D{sup 0}{yields}Xe{sup +}{nu}{sub e}, using 281 pb{sup -1} of data collected on the {psi}(3770) resonance with the CLEO-c detector. We find B(D{sup 0}{yields}Xe{sup +}{nu}{sub e})=(6.46{+-}0.17{+-}0.13)% and B(D{sup +}{yields}Xe{sup +}{nu}{sub e})=(16.13{+-}0.20{+-}0.33)%. Using the known D meson lifetimes, we obtain the ratio {gamma}{sub D{sup +}}{sup sl}/{gamma}{sub D{sup 0}}{sup sl}=0.985{+-}0.028{+-}0.015, confirming isospin invariance at the level of 3%. The positron momentum spectra from D{sup +} and D{sup 0} have consistent shapes.},
doi = {10.1103/PHYSREVLETT.97.251801},
journal = {Physical Review Letters},
number = 25,
volume = 97,
place = {United States},
year = {Fri Dec 22 00:00:00 EST 2006},
month = {Fri Dec 22 00:00:00 EST 2006}
}