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

Abstract

We observe evidence for D{sup 0}-D{sup 0} mixing by measuring the difference in the apparent lifetime when a D{sup 0} meson decays to the CP eigenstates K{sup +}K{sup -} and {pi}{sup +}{pi}{sup -} and when it decays to the final state K{sup -}{pi}{sup +}. We find the relative difference of the lifetimes y{sub CP} to be [1.31{+-}0.32(stat){+-}0.25(syst)]%, 3.2 standard deviations from zero. We also search for a CP asymmetry between D{sup 0} and D{sup 0} decays; no evidence for CP violation is found. These results are based on 540 fb{sup -1} of data recorded by the Belle detector at the KEKB e{sup +}e{sup -} collider.

Authors:
; ; ; ; ; ;  [1]; ;  [2];  [3]; ; ; ; ; ; ; ; ; ; more »;  [4] « less
  1. J. Stefan Institute, Ljubljana (Slovenia)
  2. University of Ljubljana, Ljubljana (Slovenia)
  3. (Slovenia)
  4. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan) (and others)
Publication Date:
OSTI Identifier:
20951391
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 21; Other Information: DOI: 10.1103/PhysRevLett.98.211803; (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; ASYMMETRY; CP INVARIANCE; D NEUTRAL MESONS; EIGENSTATES; KAONS MINUS; KAONS PLUS; LIFETIME; PAIR PRODUCTION; PARTICLE DECAY; PIONS MINUS; PIONS PLUS

Citation Formats

Staric, M., Bitenc, U., Bizjak, I., Fratina, S., Gorisek, A., Pestotnik, R., Zupanc, A., Golob, B., Krizan, P., J. Stefan Institute, Ljubljana, Abe, K., Adachi, I., Dragic, J., Haba, J., Hazumi, M., Higuchi, T., Itoh, R., Iwasaki, Y., Katayama, N., Kichimi, H., and Krokovny, P.. Evidence for D{sup 0}-D{sup 0} Mixing. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.211803.
Staric, M., Bitenc, U., Bizjak, I., Fratina, S., Gorisek, A., Pestotnik, R., Zupanc, A., Golob, B., Krizan, P., J. Stefan Institute, Ljubljana, Abe, K., Adachi, I., Dragic, J., Haba, J., Hazumi, M., Higuchi, T., Itoh, R., Iwasaki, Y., Katayama, N., Kichimi, H., & Krokovny, P.. Evidence for D{sup 0}-D{sup 0} Mixing. United States. doi:10.1103/PHYSREVLETT.98.211803.
Staric, M., Bitenc, U., Bizjak, I., Fratina, S., Gorisek, A., Pestotnik, R., Zupanc, A., Golob, B., Krizan, P., J. Stefan Institute, Ljubljana, Abe, K., Adachi, I., Dragic, J., Haba, J., Hazumi, M., Higuchi, T., Itoh, R., Iwasaki, Y., Katayama, N., Kichimi, H., and Krokovny, P.. Fri . "Evidence for D{sup 0}-D{sup 0} Mixing". United States. doi:10.1103/PHYSREVLETT.98.211803.
@article{osti_20951391,
title = {Evidence for D{sup 0}-D{sup 0} Mixing},
author = {Staric, M. and Bitenc, U. and Bizjak, I. and Fratina, S. and Gorisek, A. and Pestotnik, R. and Zupanc, A. and Golob, B. and Krizan, P. and J. Stefan Institute, Ljubljana and Abe, K. and Adachi, I. and Dragic, J. and Haba, J. and Hazumi, M. and Higuchi, T. and Itoh, R. and Iwasaki, Y. and Katayama, N. and Kichimi, H. and Krokovny, P.},
abstractNote = {We observe evidence for D{sup 0}-D{sup 0} mixing by measuring the difference in the apparent lifetime when a D{sup 0} meson decays to the CP eigenstates K{sup +}K{sup -} and {pi}{sup +}{pi}{sup -} and when it decays to the final state K{sup -}{pi}{sup +}. We find the relative difference of the lifetimes y{sub CP} to be [1.31{+-}0.32(stat){+-}0.25(syst)]%, 3.2 standard deviations from zero. We also search for a CP asymmetry between D{sup 0} and D{sup 0} decays; no evidence for CP violation is found. These results are based on 540 fb{sup -1} of data recorded by the Belle detector at the KEKB e{sup +}e{sup -} collider.},
doi = {10.1103/PHYSREVLETT.98.211803},
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}
}