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Title: Evidence for D{sup 0}-D{sup 0} Mixing

Abstract

We present evidence for D{sup 0}-D{sup 0} mixing in D{sup 0}{yields}K{sup +}{pi}{sup -} decays from 384 fb{sup -1} of e{sup +}e{sup -} colliding-beam data recorded near {radical}(s)=10.6 GeV with the BABAR detector at the PEP-II storage rings at the Stanford Linear Accelerator Center. We find the mixing parameters x{sup '2}=[-0.22{+-}0.30(stat){+-}0.21(syst)]x10{sup -3} and y{sup '}=[9.7{+-}4.4(stat){+-}3.1(syst)]x10{sup -3} and a correlation between them of -0.95. This result is inconsistent with the no-mixing hypothesis with a significance of 3.9 standard deviations. We measure R{sub D}, the ratio of doubly Cabibbo-suppressed to Cabibbo-favored decay rates, to be [0.303{+-}0.016(stat){+-}0.010(syst)]%. We find no evidence for CP violation.

Authors:
; ; ; ; ; ; ; ;  [1]; ;  [2]; ;  [3]; ; ;  [4]; ; ; ;  [5]
  1. Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France)
  2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
  3. Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
  4. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
  5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States) (and others)
Publication Date:
OSTI Identifier:
20951390
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 21; Other Information: DOI: 10.1103/PhysRevLett.98.211802; (c) 2007 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; COLLIDING BEAMS; CP INVARIANCE; D NEUTRAL MESONS; ELECTRON BEAMS; GEV RANGE 10-100; KAONS PLUS; MIXING; PARTICLE DECAY; PIONS MINUS; POSITRON BEAMS; STANFORD LINEAR ACCELERATOR CENTER; STORAGE RINGS

Citation Formats

Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J. P., Poireau, V., Prudent, X., Tisserand, V., Zghiche, A., Garra Tico, J., Grauges, E., Lopez, L., Palano, A., Eigen, G., Stugu, B., Sun, L., Abrams, G. S., Battaglia, M., Brown, D. N., and Button-Shafer, J.. Evidence for D{sup 0}-D{sup 0} Mixing. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.211802.
Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J. P., Poireau, V., Prudent, X., Tisserand, V., Zghiche, A., Garra Tico, J., Grauges, E., Lopez, L., Palano, A., Eigen, G., Stugu, B., Sun, L., Abrams, G. S., Battaglia, M., Brown, D. N., & Button-Shafer, J.. Evidence for D{sup 0}-D{sup 0} Mixing. United States. doi:10.1103/PHYSREVLETT.98.211802.
Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J. P., Poireau, V., Prudent, X., Tisserand, V., Zghiche, A., Garra Tico, J., Grauges, E., Lopez, L., Palano, A., Eigen, G., Stugu, B., Sun, L., Abrams, G. S., Battaglia, M., Brown, D. N., and Button-Shafer, J.. Fri . "Evidence for D{sup 0}-D{sup 0} Mixing". United States. doi:10.1103/PHYSREVLETT.98.211802.
@article{osti_20951390,
title = {Evidence for D{sup 0}-D{sup 0} Mixing},
author = {Aubert, B. and Bona, M. and Boutigny, D. and Karyotakis, Y. and Lees, J. P. and Poireau, V. and Prudent, X. and Tisserand, V. and Zghiche, A. and Garra Tico, J. and Grauges, E. and Lopez, L. and Palano, A. and Eigen, G. and Stugu, B. and Sun, L. and Abrams, G. S. and Battaglia, M. and Brown, D. N. and Button-Shafer, J.},
abstractNote = {We present evidence for D{sup 0}-D{sup 0} mixing in D{sup 0}{yields}K{sup +}{pi}{sup -} decays from 384 fb{sup -1} of e{sup +}e{sup -} colliding-beam data recorded near {radical}(s)=10.6 GeV with the BABAR detector at the PEP-II storage rings at the Stanford Linear Accelerator Center. We find the mixing parameters x{sup '2}=[-0.22{+-}0.30(stat){+-}0.21(syst)]x10{sup -3} and y{sup '}=[9.7{+-}4.4(stat){+-}3.1(syst)]x10{sup -3} and a correlation between them of -0.95. This result is inconsistent with the no-mixing hypothesis with a significance of 3.9 standard deviations. We measure R{sub D}, the ratio of doubly Cabibbo-suppressed to Cabibbo-favored decay rates, to be [0.303{+-}0.016(stat){+-}0.010(syst)]%. We find no evidence for CP violation.},
doi = {10.1103/PHYSREVLETT.98.211802},
journal = {Physical Review Letters},
number = 21,
volume = 98,
place = {United States},
year = {Fri May 25 00:00:00 EDT 2007},
month = {Fri May 25 00:00:00 EDT 2007}
}