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Direct limits on the oscillation frequency
V M Abazov1, B Abbott, M Abolins
1Joint Institute for Nuclear Research, Dubna, Russia.
Physical Review Letters
|August 16, 2006
Summary
Researchers measured the B(s)(0) oscillation frequency using D0 experiment data. The study provides a precise measurement, with a most probable value of 19 ps(-1) for the B(s)(0) oscillation frequency.
Area of Science:
- Particle Physics
- High Energy Physics
- Quantum Mechanics
Background:
- The B(s)(0) meson is a type of subatomic particle composed of a bottom antiquark and a strange quark.
- Understanding B(s)(0) meson oscillations is crucial for testing the Standard Model of particle physics.
Purpose of the Study:
- To measure the oscillation frequency of the B(s)(0) meson.
- To provide a precise, direct measurement of the B(s)(0) oscillation frequency using a large dataset.
Main Methods:
- Analysis of approximately 1 fb(-1) of integrated luminosity data from semileptonic B(s)(0) decays.
- Utilized the amplitude method and a likelihood scan to determine the oscillation frequency.
- Data collected by the D0 experiment at the Fermilab Tevatron Collider between 2002 and 2006.
Main Results:
- A lower limit on the B(s)(0) oscillation frequency was set at 14.8 ps(-1) (95% C.L.) using the amplitude method.
- At delta m(s) = 19 ps(-1), the amplitude deviated by 2.5 (1.6) standard deviations from the A=0 hypothesis, yielding a two-sided C.L. of 1% (10%).
- A likelihood scan yielded a most probable value of 19 ps(-1) and a 90% C.L. range of 17 < delta m(s) < 21 ps(-1).
Conclusions:
- This study presents the first direct, two-sided measurement of the B(s)(0) oscillation frequency by a single experiment.
- The results provide a significant constraint on the B(s)(0) oscillation frequency, with implications for new physics searches.
- The probability of observing a similar likelihood minimum for delta m(s) > 22 ps(-1) is (5.0 +/- 0.3)%.
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