New physics inB→ππ andB→πKdecays | Zendy

Seungwon Baek | Zendy

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New physics inB→ππ andB→πKdecays

Author(s) -

Seungwon Baek

Publication year - 2006

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2006/07/025

Subject(s) - electroweak interaction , physics , particle physics , parametrization (atmospheric modeling) , physics beyond the standard model , amplitude , quantum chromodynamics , symmetry (geometry) , standard model (mathematical formulation) , symmetry breaking , cp violation , quantum mechanics , mathematics , radiative transfer , geometry , archaeology , gauge (firearms) , history

We perform a combined analysis of $B \to \pi \pi$ and $B \to \pi K$ decayswith the current experimental data. Assuming SU(3) flavor symmetry and no newphysics contributions to the topological amplitudes, we demonstrate that theconventional parametrization in the Standard Model (SM) does not describe thedata very well, in contrast with a similar analysis based on the earlier data.It is also shown that the introduction of smaller amplitudes and reasonableSU(3) breaking parameters does not improve the fits much. Interpreting thesepuzzling behaviors in the SM as a new physics (NP) signal, we study various NPscenarios. We find that when a single NP amplitude dominates, the NP in theelectroweak penguin sector is the most favorable. However, other NP solutions,such as NP residing in the QCD-penguin sector and color-suppressed electroweakpenguin sector simultaneously, can also solve the puzzle.Comment: 17 pages; Added references, Corrected typo

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