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Title: Improved Measurement of B(D{sup +}{yields}{mu}{sup +}{nu}) and the Pseudoscalar Decay Constant f{sub D{sup +}}

Abstract

We extract a relatively precise value for the decay constant of the D{sup +} meson by measuring B(D{sup +}{yields}{mu}{sup +}{nu})=(4.40{+-}0.66{sub -0.12}{sup +0.09})x10{sup -4} using 281 pb{sup -1} of data taken on the {psi}(3770) resonance with the CLEO-c detector. We find f{sub D{sup +}}=(222.6{+-}16.7{sub -3.4}{sup +2.8}) MeV, and compare with current theoretical calculations. We also set a 90% confidence upper limit on B(D{sup +}{yields}e{sup +}{nu})<2.4x10{sup -5} which constrains new physics models.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1];  [2]; ; ;  [3]
  1. Syracuse University, Syracuse, New York 13244 (United States)
  2. Vanderbilt University, Nashville, Tennessee 37235 (United States)
  3. Wayne State University, Detroit, Michigan 48202 (United States) [and others
Publication Date:
OSTI Identifier:
20699694
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 95; Journal Issue: 25; Other Information: DOI: 10.1103/PhysRevLett.95.251801; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). CLEO Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CESR STORAGE RING; COMPARATIVE EVALUATIONS; D PLUS MESONS; ELECTRONS; LEPTONIC DECAY; MEV RANGE 100-1000; MULTIPARTICLE SPECTROMETERS; MUONS PLUS; NEUTRINOS; PARTICLE IDENTIFICATION; PSI-3770 MESONS; UNIFIED GAUGE MODELS

Citation Formats

Artuso, M., Boulahouache, C., Blusk, S., Butt, J., Dorjkhaidav, O., Li, J., Menaa, N., Mountain, R., Nandakumar, R., Randrianarivony, K., Redjimi, R., Sia, R., Skwarnicki, T., Stone, S., Wang, J.C., Zhang, K., Csorna, S.E., Bonvicini, G., Cinabro, D., and Dubrovin, M. Improved Measurement of B(D{sup +}{yields}{mu}{sup +}{nu}) and the Pseudoscalar Decay Constant f{sub D{sup +}}. United States: N. p., 2005. Web. doi:10.1103/PhysRevLett.95.251801.
Artuso, M., Boulahouache, C., Blusk, S., Butt, J., Dorjkhaidav, O., Li, J., Menaa, N., Mountain, R., Nandakumar, R., Randrianarivony, K., Redjimi, R., Sia, R., Skwarnicki, T., Stone, S., Wang, J.C., Zhang, K., Csorna, S.E., Bonvicini, G., Cinabro, D., & Dubrovin, M. Improved Measurement of B(D{sup +}{yields}{mu}{sup +}{nu}) and the Pseudoscalar Decay Constant f{sub D{sup +}}. United States. doi:10.1103/PhysRevLett.95.251801.
Artuso, M., Boulahouache, C., Blusk, S., Butt, J., Dorjkhaidav, O., Li, J., Menaa, N., Mountain, R., Nandakumar, R., Randrianarivony, K., Redjimi, R., Sia, R., Skwarnicki, T., Stone, S., Wang, J.C., Zhang, K., Csorna, S.E., Bonvicini, G., Cinabro, D., and Dubrovin, M. Fri . "Improved Measurement of B(D{sup +}{yields}{mu}{sup +}{nu}) and the Pseudoscalar Decay Constant f{sub D{sup +}}". United States. doi:10.1103/PhysRevLett.95.251801.
@article{osti_20699694,
title = {Improved Measurement of B(D{sup +}{yields}{mu}{sup +}{nu}) and the Pseudoscalar Decay Constant f{sub D{sup +}}},
author = {Artuso, M. and Boulahouache, C. and Blusk, S. and Butt, J. and Dorjkhaidav, O. and Li, J. and Menaa, N. and Mountain, R. and Nandakumar, R. and Randrianarivony, K. and Redjimi, R. and Sia, R. and Skwarnicki, T. and Stone, S. and Wang, J.C. and Zhang, K. and Csorna, S.E. and Bonvicini, G. and Cinabro, D. and Dubrovin, M.},
abstractNote = {We extract a relatively precise value for the decay constant of the D{sup +} meson by measuring B(D{sup +}{yields}{mu}{sup +}{nu})=(4.40{+-}0.66{sub -0.12}{sup +0.09})x10{sup -4} using 281 pb{sup -1} of data taken on the {psi}(3770) resonance with the CLEO-c detector. We find f{sub D{sup +}}=(222.6{+-}16.7{sub -3.4}{sup +2.8}) MeV, and compare with current theoretical calculations. We also set a 90% confidence upper limit on B(D{sup +}{yields}e{sup +}{nu})<2.4x10{sup -5} which constrains new physics models.},
doi = {10.1103/PhysRevLett.95.251801},
journal = {Physical Review Letters},
number = 25,
volume = 95,
place = {United States},
year = {Fri Dec 16 00:00:00 EST 2005},
month = {Fri Dec 16 00:00:00 EST 2005}
}
  • We measure the branching ratio of the purely leptonic decay of the D{sup +} meson with unprecedented precision as B(D{sup +}{yields}{mu}{sup +}{nu})=(3.82{+-}0.32{+-}0.09)x10{sup -4}, using 818 pb{sup -1} of data taken on the {psi}(3770) resonance with the CLEO-c detector at the CESR collider. We use this determination to derive a value for the pseudoscalar decay constant f{sub D{sup +}}, combining with measurements of the D{sup +} lifetime and assuming |V{sub cd}|=|V{sub us}|. We find f{sub D{sup +}}=(205.8{+-}8.5{+-}2.5) MeV. The decay rate asymmetry ({gamma}(D{sup +}{yields}{mu}{sup +}{nu})-{gamma}(D{sup -}{yields}{mu}{sup -}{nu})/{gamma}(D{sup +}{yields}{mu}{sup +}{nu})+{gamma}(D{sup -}{yields}{mu}{sup -}{nu}))=0.08{+-}0.08, consistent with no CP violation. We also set 90% confidencemore » level upper limits on B(D{sup +}{yields}{tau}{sup +}{nu})<1.2x10{sup -3} and B(D{sup +}{yields}e{sup +}{nu})<8.8x10{sup -6}.« less
  • In 60 pb{sup -1} of data taken on the {psi}(3770) resonance with the CLEO-c detector, we find eight D{sup +}{yields}{mu}{sup +}{nu} decay candidates that are mostly signal, containing only one estimated background. Using this statistically compelling sample, we measure a value of B(D{sup +}{yields}{mu}{sup +}{nu})=(3.5{+-}1.4{+-}0.6)x10{sup -4}, and determine f{sub D{sup +}}=(202{+-}41{+-}17) MeV.
  • Analyzing 600 pb{sup -1} of e{sup +}e{sup -} collisions at 4170 MeV center-of-mass energy with the CLEO-c detector, we measure the branching fraction B(D{sub s}{sup +}{yields}{tau}{sup +}{nu})=(5.52{+-}0.57{+-}0.21)% using the {tau}{sup +}{yields}{rho}{sup +}{nu} decay mode. Combining with other CLEO measurements of B(D{sub s}{sup +}{yields}{tau}{sup +}{nu}) we determine the pseudoscalar decay constant f{sub D{sub s}}=(259.7{+-}7.8{+-}3.4) MeV consistent with the value obtained from our D{sub s}{sup +}{yields}{mu}{sup +}{nu} measurement of (257.6{+-}10.3{+-}4.3) MeV. Combining these measurements we find a value of f{sub D{sub s}}=(259.0{+-}6.2{+-}3.0) MeV, that differs from the most accurate prediction based on unquenched lattice gauge theory of (241{+-}3) MeV by 2.4 standardmore » deviations. We also present the first measurements of B(D{sub s}{sup +}{yields}K{sup 0}{pi}{sup +}{pi}{sup 0})=(1.00{+-}0.18{+-}0.04)%, and B(D{sub s}{sup +}{yields}{pi}{sup +}{pi}{sup 0}{pi}{sup 0})=(0.65{+-}0.13{+-}0.03)%, and measure a new value for B(D{sub s}{sup +}{yields}{eta}{rho}{sup +})=(8.9{+-}0.6{+-}0.5)%.« less
  • We examine e{sup +}e{sup -}{yields}D{sub s}{sup -}D{sub s}*{sup +} and D{sub s}*{sup -}D{sub s}{sup +} interactions at 4170 MeV using the CLEO-c detector in order to measure the decay constant f{sub D{sub s}{sup +}} with good precision. Previously our measurements were substantially higher than the most precise lattice based QCD calculation of (241{+-}3) MeV. Here we use the D{sub s}{sup +}{yields}l{sup +}{nu} channel, where the l{sup +} designates either a {mu}{sup +} or a {tau}{sup +}, when the {tau}{sup +}{yields}{pi}{sup +}{nu}. Analyzing both modes independently, we determine B(D{sub s}{sup +}{yields}{mu}{sup +}{nu})=(0.565{+-}0.045{+-}0.017)%, and B(D{sub s}{sup +}{yields}{tau}{sup +}{nu})=(6.42{+-}0.81{+-}0.18)%. We also analyze themmore » simultaneously to find an effective value of B{sup eff}(D{sub s}{sup +}{yields}{mu}{sup +}{nu})=(0.591{+-}0.037{+-}0.018)% and f{sub D{sub s}{sup +}}=(263.3{+-}8.2{+-}3.9) MeV. Combining with the CLEO-c value determined independently using D{sub s}{sup +}{yields}{tau}{sup +}{nu}, {tau}{sup +}{yields}e{sup +}{nu}{nu} decays, we extract f{sub D{sub s}{sup +}}=(259.5{+-}6.6{+-}3.1) MeV. Combining with our previous determination of B(D{sup +}{yields}{mu}{sup +}{nu}), we extract the ratio f{sub D{sub s}{sup +}}/f{sub D{sup +}}=1.26{+-}0.06{+-}0.02. No evidence is found for a CP asymmetry between {gamma}(D{sub s}{sup +}{yields}{mu}{sup +}{nu}) and {gamma}(D{sub s}{sup -}{yields}{mu}{sup -}{nu}); specifically the fractional difference in rates is measured to be (4.8{+-}6.1)%. Finally, we find B(D{sub s}{sup +}{yields}e{sup +}{nu})<1.2x10{sup -4} at 90% confidence level.« less
  • We examine e{sup +}e{sup -}{yields}D{sub s}{sup -}D{sub s}*{sup +} and D{sub s}*{sup -}D{sub s}{sup +} interactions at 4170 MeV using the CLEO-c detector in order to measure the decay constant f{sub D{sub s}{sup +}}. We use the D{sub s}{sup +}{yields}l{sup +}{nu} channel, where the l{sup +} designates either a {mu}{sup +} or a {tau}{sup +}, when the {tau}{sup +}{yields}{pi}{sup +}{nu}. Analyzing both modes independently, we determine B(D{sub s}{sup +}{yields}{mu}{sup +}{nu})=(0.594{+-}0.066{+-}0.031)%, and B(D{sub s}{sup +}{yields}{tau}{sup +}{nu})=(8.0{+-}1.3{+-}0.4)%. We also analyze them simultaneously to find an effective value of B{sup eff}(D{sub s}{sup +}{yields}{mu}{sup +}{nu})=(0.638{+-}0.059{+-}0.033)% and extract f{sub D{sub s}{sup +}}=274{+-}13{+-}7 MeV. Combining withmore » our previous determination of B(D{sup +}{yields}{mu}{sup +}{nu}), we also find the ratio f{sub D{sub s}{sup +}}/f{sub D{sup +}}=1.23{+-}0.11{+-}0.04. We compare to current theoretical estimates. Finally, we find B(D{sub s}{sup +}{yields}e{sup +}{nu})<1.3x10{sup -4} at 90% confidence level.« less