Publikation: Zeitschriftenartikel

A measurement of the CP asymmetry difference between [Lambda]+cpKK+ and p+ decays

Grunddaten
Abstract
Autoren
Einrichtung

Grunddaten

Titel	A measurement of the CP asymmetry difference between [Lambda]+cpKK+ and p+ decays
Erscheinungsjahr	2018
Heft-Nr.	3
Jahr	2018
Publikationsform	Elektronische Ressource
Publikationsart	Zeitschriftenartikel
Sprache	Englisch
DOI	10.1007/JHEP03(2018)182
Letzte Änderung	01.04.2021 06:02:19
Bearbeitungsstatus	durch UB Rostock abschließend validiert
Dauerhafte URL	http://purl.uni-rostock.de/fodb/pub/65528
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Abstract

The difference between the CP asymmetries in the decays c + pKK+ and c + p+ is presented. Proton-proton collision data taken at centre-of-mass energies of 7 and 8 TeV collected by the LHCb detector in 2011 and 2012 are used, corresponding to an integrated luminosity of 3 fb1. The c + candidates are reconstructed as part of the b 0 c + X decay chain. In order to maximize the cancellation of production and detection asymmetries in the difference, the final-state kinematic distributions of the two samples are aligned by applying phase-space-dependent weights to the c + p+ sample. This alters the definition of the integrated CP asymmetry to A CP wgt (p+). Both samples are corrected for reconstruction and selection efficiencies across the five-dimensional c + decay phase space. The difference in CP asymmetries is found to be AwgtCP=ACP(pKK+)AwgtCP(p+)=(0.30±0.91±0.61) %,ACPwgt=ACP(pKK+)ACPwgt(p+)=(0.30±0.91±0.61) %, \begin{array}{c}\hfill \Delta {A}_{CP}^{\mathrm{wgt}}={A}_{CP}\left(p{K}^{-}{K}^{+}\right) - {A}_{CP}^{\mathrm{wgt}}\left(p{\pi}^{-}{\pi}^{+}\right)\hfill \\ {}\hfill = \left(0.30 \pm 0.91 \pm 0.61\right)\ \%,\hfill \end{array} where the first uncertainty is statistical and the second is systematic. Open image in new window

Autoren

Aaij, Roel
D'Argent, Philippe
Bachmann, Sebastian
Berninghoff, Daniel
Braun, Svende
Comerma-Montells, Albert
De Cian, Michel
Dziewiecki, Michal
Esen, Sevda
Gerick, David
Grabowski, Jascha
Grünberg, Oliver
Han, Xiaoxue
Hansmann-Menzemer, Stephanie
Heß, Miriam
Kecke, Matthieu
Khanji, Basem
Kolpin, Michael
Kopecná, Renata
Leverington, Blake
Marks, Jörg
Meinert, Nis
Mitzel, Dominik
Neubert, Sebastian
Neuner, Max
Nikodem, Thomas
Piucci, Alessio
Skidmore, Nicola
Stahl, Marian
Stemmle, Simon
Uwer, Ulrich
Zhelezov, Alexey
van Tilburg, Jeroen
Viemann, Harald
Waldi, Roland

Einrichtung

MNF/Institut für Physik (IfPH)