B. D'Almagne
University of Edinburgh
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Publication
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Physics Letters B | 2012
R. Aaij; L. Arrabito; I. De Bonis; D. Decamp; Ph. Ghez; P. Hopchev; J. P. Lees; I. V. Machikhiliyan; M.-N. Minard; B. Pietrzyk; S. T'Jampens; V. Tisserand; E. Tournefier; S. Barsuk; O. Callot; B. D'Almagne; J. He; B. Jean-Marie; J. Lefrançois; F. Machefert; A. Martín Sánchez; M. Nicol; P. Robbe; M. H. Schune; B. Viaud; I. Videau; Z. Ajaltouni; O. Deschamps; Pierre Henrard; Marwa Jahjah-Hussein
Abstract Measurement of mixing-induced CP violation in B ¯ s 0 decays is of prime importance in probing new physics. So far only the channel B ¯ s 0 → J / ψ ϕ has been used. Here we report on a measurement using an LHCb data sample of 0.41 fb−1, in the CP odd eigenstate J / ψ f 0 ( 980 ) , where f 0 ( 980 ) → π + π − . A time-dependent fit of the data with the B ¯ s 0 lifetime and the difference in widths of the heavy and light eigenstates constrained to the values obtained from B ¯ s 0 → J / ψ ϕ yields a value of the CP violating phase of − 0.44 ± 0.44 ± 0.02 rad , consistent with the Standard Model expectation.
Physics Letters B | 2011
R. Aaij; E. Ben-Haim; M. Benayoun; P. David; L. Del Buono; De Bonis; D. Decamp; Ph. Ghez; P. Hopchev; J. P. Lees; I. V. Machikhiliyan; M.-N. Minard; B. Pietrzyk; S. T'Jampens; V. Tisserand; L. Arrabito; Z. Ajaltouni; O. Deschamps; Pierre Henrard; Marwa Jahjah-Hussein; R. Lefèvre; L. Li Gioi; S. Monteil; V. Niess; Pascal Perret; Diego Alejandro Roa Romero; K. Sobczak; S. Barsuk; O. Callot; B. D'Almagne
The first observation of the decay
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