Precise determination of the $$B_{\mathrm{s}}^0$$–$$\overline B_{\mathrm{s}}^0$$ oscillation frequency
Precise determination of the $$B_{\mathrm{s}}^0$$–$$\overline B_{\mathrm{s}}^0$$ oscillation frequency
复制标题
精确确定$$B_{mathrm{s}}^0$$â$$overline B_{mathrm{s}}^0$$振荡频率
DOI：
10.1038/s41567-021-01394-x
复制
发表时间：
2022
期刊：
影响因子：
19.6
通讯作者：
Akar, S.
中科院分区：
文献类型：
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作者：
Aaij, R.;Beteta, C. Abellán;Ackernley, T.;Adeva, B.;Adinolfi, M.;Afsharnia, H.;Aidala, C. A.;Aiola, S.;Ajaltouni, Z.;Akar, S.
Mesons comprising a beauty quark and strange quark can oscillate between particle () and antiparticle () flavour eigenstates, with a frequency given by the mass difference between heavy and light mass eigenstates, Δms. Here we present a measurement of Δmsusingπ+decays produced in proton–proton collisions collected with the LHCb detector at the Large Hadron Collider. The oscillation frequency is found to be Δms= 17.7683 ± 0.0051 ± 0.0032 ps−1, where the first uncertainty is statistical and the second is systematic. This measurement improves on the current Δmsprecision by a factor of two. We combine this result with previous LHCb measurements to determine Δms= 17.7656 ± 0.0057 ps−1, which is the legacy measurement of the original LHCb detector.
DOI：
10.22323/1.321.0230
发表时间：
2018-09
期刊：
Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)
影响因子：
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作者：
Davide Fazzini
通讯作者：
Davide Fazzini