Hochberg Y, Nir Y. Relating direct CP violation in D decays and the forward-backward asymmetry in tt[over ¯] production.
PHYSICAL REVIEW LETTERS 2012;
108:261601. [PMID:
23004958 DOI:
10.1103/physrevlett.108.261601]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Indexed: 06/01/2023]
Abstract
The CDF and LHCb experiments have recently provided two intriguing hints for new physics: a large forward-backward asymmetry in tt[over ¯] production and a direct CP asymmetry in D decays of order of a percent. In both cases, flavor nonuniversal interactions are required in the up sector, raising the possibility that the two effects come from one and the same new physics source. We show that a minimal model, with an extra scalar doublet, previously suggested to explain the top data, gives-without any modifications or additions-a contribution to CP violation in charm decays that is of the right size.
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