Using the B0 → K±π ∓ channel as normalization in the search for the charged lepton flavor violating B0 (s) → e ±µ ∓ decay

Wiersema, G. S. P. (2017) Using the B0 → K±π ∓ channel as normalization in the search for the charged lepton flavor violating B0 (s) → e ±µ ∓ decay. Master's Thesis / Essay, Physics.

Preview	Text MScThesis_G_Wiersema_s2033178.pdf - Published Version Download (5MB) | Preview
	Text Toestemming.pdf - Other Restricted to Backend only Download (80kB)

Abstract

This master’s thesis describes the use of the B0 ? K±? ? channel as normalization in the search for the charged lepton flavor violating B0 (s) ? e ±µ ? decay. Charged lepton flavor violating decays are heavily suppressed in the Standard Model and are therefore used to probe for New Physics. Using LHC Run I data, collected by the LHCb detector in the years 2011 and 2012, this analysis determines the B0 ? K±? ? channel’s yield, and the efficiencies of the LHCb detector’s acceptance, trigger, reconstruction&selection and particle identification. We find a value for the normalization factor ?norm of (3.91 ± 0.21) · 10?12 , respectively, (1.69 ± 0.06) · 10?12 for the 2011 and 2012 samples, which are used to determine the B(B0 ? e ±µ ?) = ?norm · Nsig �sig and B(B0 s ? e ±µ ?) = ?norm · fd fs · Nsig �sig branching fractions, and identify the yield determination as the largest contributor to the uncertainty on ?norm for both 2011 and 2012.

Item Type:	Thesis (Master's Thesis / Essay)
Degree programme:	Physics
Thesis type:	Master's Thesis / Essay
Language:	English
Date Deposited:	15 Feb 2018 08:27
Last Modified:	15 Feb 2018 09:42
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/15056

Actions (login required)

View Item