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	Author	LHCb Collaboration (Aaij, R. et al); Fernandez Casani, A.; Jaimes Elles, S.J.; Jashal, B.K.; Libralon, S.; Martinez-Vidal, F.; Mazorra de Cos, J.; Oyanguren, A.; Rebollo De Miguel, M.; Sanderswood, I.; Zhuo, J.
	Title	Measurement of CP violation in B0 → D+D- and B0s→ D+ s D- s decays			Type	Journal Article
	Year	2025	Publication	Journal of High Energy Physics	Abbreviated Journal	J. High Energy Phys.
	Volume	01	Issue	1	Pages	061 - 26pp
	Keywords	CP Violation; Hadron-Hadron Scattering
	Abstract	A time-dependent, flavour-tagged measurement of CP violation is performed with B-0 -> D+D- and B-s(0)-> D+ (s) D- (s)decays, using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy of 13TeV corresponding to an integrated luminosity of 6 fb(-1). In B-0 -> D+D- decays the CP-violation parameters are measured to be S-D(+) (-)(D) = -0.552 +/- 0.100 (stat) +/- 0.010 (syst), C-D(+) (-)(D) = 0.128 +/- 0.103 (stat) +/- 0.010 (syst). In B-s(0)-> D+ (s) D- (s) decays the CP-violating parameter formulation in terms of phi(s) and \|lambda\| results in phi s = -0.086 +/- 0.106 (stat) +/- 0.028 (syst) rad, \|lambda (+)(D) (-)(s D) (s) \| = 1.145 +/- 0.126 (stat) +/- 0.031 (syst). These results represent the most precise single measurement of the CP-violation parameters in their respective channels. For the first time in a single measurement, CP symmetry is observed to be violated in B-0 -> D+D- decays with a significance exceeding six standard deviations.
	Address	[Dekkers, S.; Egede, U.; Fujii, Y.; Hadavizadeh, T.; Henderson, R. D. L.; Lane, J. J.; Liu, F. L.; Monk, M.; Song, R.; Walton, E. J.; Ward, J. A.] Monash Univ, Sch Phys & Astron, Melbourne, Vic, Australia, Email: louis.gerken@cern.ch
	Corporate Author				Thesis
	Publisher	Springer	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1029-8479	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:001410291300001			Approved	no
	Is ISI	yes	International Collaboration	yes
	Call Number	IFIC @ pastor @			Serial	6622
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