CMSPublic Web>CMSPublic>PhysicsResultsFTR13022 (2013-10-04, KaiFengChen)

CMS reach in B_s to mu⁺mu^- and B⁰ to mu⁺mu^- branching fractions for the new LHC runs

Abstract

We estimate the possible reach on the ${\rm B_s^0}\to\mu^+\mu^-$ and ${\rm B}^0\to\mu^+\mu^-$ branching fractions for the runs of the LHC at $\sqrt{s}$ = 14 TeV and for the integrated luminosities of 100, 300, and 3000 fb^-1. With the increased data sample sizes it will be possible to reduce both systematic and statistical errors leading to high precision measurements of branching fractions of ${\rm B^0}\to\mu^+\mu^-$ and ${\rm B_s^0}\to\mu^+\mu^-$ decays, which will allow stringent tests of the Standard Model. At 3000 fb^-1 it will be possible to measure the ${\rm B^0}\to\mu^+\mu^-$ with more than 5 $\sigma$ significance.

Projected sensitivity

Number of expected events for ${\rm B_s^0}\to\mu^+\mu^-$ and ${\rm B}^0\to\mu^+\mu^-$ at different integrated luminosity values. We also report the expected uncertainty in the branching fraction measurement for the ${\rm B_s^0}\to\mu^+\mu^-$ and ${\rm B}^0\to\mu^+\mu^-$ , the range of significance of ${\rm B}^0\to\mu^+\mu^-$ (the range indicates the $\pm1\sigma$ of the distribution of significance), and the relative uncertainty on the ${\rm B}^0$ to ${\rm B_s^0}$ branching fractions.

Figure	Caption
	Fit results of the invariant mass distribution for 300 fb^-1 and 3000 fb^-1. The improvement in the mass resolution for the 3000 fb^-1 projection is expected from an improved inner tracker system and removing endcap candidates.

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who
pdf	data_weighted_300.pdf	r1	manage	22.5 K	2013-09-30 - 18:54	KaiFengChen
png	data_weighted_300.png	r1	manage	49.8 K	2013-09-30 - 21:08	KaiFengChen
pdf	data_weighted_3000.pdf	r1	manage	28.5 K	2013-09-30 - 18:54	KaiFengChen
png	data_weighted_3000.png	r1	manage	52.0 K	2013-09-30 - 21:08	KaiFengChen
pdf	table.pdf	r3 r2 r1	manage	215.9 K	2013-10-02 - 18:53	KaiFengChen
png	table.png	r3 r2 r1	manage	41.2 K	2013-10-02 - 18:53	KaiFengChen

Topic revision: r4 - 2013-10-04 - KaiFengChen

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CMS reach in Bs to mu+mu- and B0 to mu+mu- branching fractions for the new LHC runs

Abstract

Projected sensitivity

CMS reach in B_s to mu⁺mu^- and B⁰ to mu⁺mu^- branching fractions for the new LHC runs