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	Author	LHCb Collaboration (Aaij, R. et al); Fernandez Casani, A.; Jaimes Elles, S.J.; Libralon, S.; Lucio Martinez, M.; Martinez-Vidal, F.; Mazorra de Cos, J.; Oyanguren, A.; Rebollo De Miguel, M.; Sanderswood, I.; Svintozelskyi, V.; Velilla Serna, J.; Zhuo, J.
	Title	*CP Violation Analysis of Local and Nonlocal Amplitudes in the (B)over-bar0 → (K)over-bar0μ+μ- Decay**			Type	Journal Article
	Year	2026	Publication	Physical Review Letters	Abbreviated Journal	Phys. Rev. Lett.
	Volume	137	Issue	6	Pages	061801 - 12pp
	Keywords
	Abstract	A search for CP violation in the (B) over bar (0) -> (K) over bar*(0)mu(+)mu(-) decay is performed using proton-proton collision data collected by the LHCb experiment during Run 1 and Run 2, corresponding to an integrated luminosity of 8.4 fb(-1). The analysis exploits the full angular distribution of the decay, providing sensitivity to CP-violating effects in both vector and axial-vector contributions to this flavor-changing neutral-current process. The complex Wilson coefficients are determined within the weak effective theory through an unbinned maximum-likelihood fit to the angular observables, incorporating nonlocal hadronic amplitudes across the full dimuon mass spectrum. The precision of the CP-violation observables is improved by an order of magnitude relative to previous measurements, with the imaginary parts of the Wilson coefficients now determined more precisely than the real parts. No significant CP violation is observed, and the results are consistent with the standard model.
	Address	[Bonacci, R. B.; Chizhik, G.; Dekkers, S.; Egede, U.; Hadavizadeh, T.; Harris, T. J.; Henderson, R. D. L.; Jelavic, A.; Lane, J. J.; Liu, F. L.; Lobo, I.; Song, R.; Walton, E. J.] Monash Univ, Sch Phys & Astron, Melbourne, Vic, Australia
	Corporate Author				Thesis
	Publisher	Amer Physical Soc	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0031-9007	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:001848706900001			Approved	no
	Is ISI	yes	International Collaboration	yes
	Call Number	IFIC @ pastor @			Serial	7460
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