Published January 1, 2021
| Version v1
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Precise Measurement of the D-0 and D+ Lifetimes at Belle II
Creators
- 1. Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy
- 2. H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
- 3. Panjab Univ, Chandigarh 160014, India
- 4. St Francis Xavier Univ, Antigonish, NS B2G 2W5, Canada
- 5. Univ Tokyo, Dept Phys, Tokyo 1130033, Japan
- 6. Alikhanyan Natl Sci Lab, Yerevan 0036, Armenia
- 7. Brookhaven Natl Lab, Upton, NY 11973 USA
- 8. Univ Cincinnati, Cincinnati, OH 45221 USA
- 9. Taras Shevchenko Natl Univ Kiev, Kiev, Ukraine
- 10. DESY, D-22607 Hamburg, Germany
- 11. Karlsruher Inst Technol, Inst Expt Teilchenphys, D-76131 Karlsruhe, Germany
- 12. Indian Inst Technol Bhubaneswar, Satya Nagar 751007, India
- 13. Univ Paris Saclay, IJCLab, CNRS IN2P3, F-91405 Orsay, France
- 14. Univ Louisville, Louisville, KY 40292 USA
Description
We report a measurement of the D-0 and D+ lifetimes using D-0 -> K-pi(+) and D+ -> K-pi(+)pi(+) decays reconstructed in e(+)e(-) -> c (c) over bar data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy e(+)e(-) collider. The data, collected at center-of-mass energies at or near the (sic)(4S) resonance, correspond to an integrated luminosity of 72 fb(-1). The results, (tau)(D-0) = 410.5 +/- 1.1 (stat) +/- 0.8(syst) fs and tau(D-0) = 1030.4 +/- 4.7 (stat) +/- 3.1 (syst) fs, are the most precise to date and are consistent with previous determinations.
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