Measurements of the absolute branching fraction of Λc+ → pK-π+ and the relative branching fraction of Bu+ → p π+ π+ Σc(2520)--.

The baryonic decay Bu+ → p π+ π+ Σc(2455)-- is exploited in this thesis for two different measurements and constitutes their common element. A measurement of the absolute Λc+ → pK-π+ branching fraction was performed, in a model independent way and for the first time in a hadronic environment, on data recorded by the LHCb experiment during the years 2011 and 2012, corresponding to an integrated luminosity of 3fb-1 . The branching fraction is measured to be B(Λc+ → pK-π+ ) = 0.079 ± 0.015(stat) ± 0.008(syst) In addition, the first observation of the decays Bu+ → p π+ π+ Σc(2520)-- and Bu+ → p π+ π- Σc(2520)0 are reported using the same data sample. The branching fraction of the decay Bu+ → p π+ π+ Σc(2520)-- is measured with respect to the Bu+ → p π+ π+ Σc(2455)-- mode to be B(Bu+ → p π+ π+ Σc(2520)--) = (2.4 ± 0.78(stat) ± 0.64(syst)) · 10-4

Grantor dc:publisher

Università degli Studi di Cagliari

Year dc:date

2017

Author dc:creator

• VACCA, CLAUDIA

Contributors dc:contributor

• SAITTA, BIAGIO

• Settore FIS/05 - Astronomia e Astrofisica

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

eng

Handle dc:identifier

http://hdl.handle.net/11584/248735

OAI identifier oai:identifier

oai:iris.unica.it:11584/248735