THE EFFECTS OF A FAMILY NONUNIVERSAL Z′ BOSON ON B → ππ DECAYS-Reference-Cited by-同舟云学术

THE EFFECTS OF A FAMILY NONUNIVERSAL Z′ BOSON ON B → ππ DECAYS

Published:2011-03-30 Issue:07n08 Volume:26 Page:1273-1294
ISSN:0217-751X
Container-title:International Journal of Modern Physics A
language:en
Short-container-title:Int. J. Mod. Phys. A

Author:

CHANG QIN¹²,LI XIN-QIANG¹³,YANG YA-DONG²⁴

Affiliation:

1. Department of Physics, Henan Normal University, Xinxiang, Henan 453007, P. R. China

2. Institute of Particle Physics, Huazhong Normal University, Wuhan, Hubei 430079, P. R. China

3. IFIC, Universitat de València-CSIC, Apt. Correus 22085, E-46071 València, Spain

4. Key Laboratory of Quark & Lepton Physics, Ministry of Education, Huazhong Normal University, Wuhan, Hubei, 430079, P. R. China

Abstract

Motivated by the measured large branching ratio of [Formula: see text] (the so-called ππ puzzle), we investigate the effects of a family nonuniversal Z′ model on the tree-dominated B → ππ decays. We find that the Z′ coupling parameter [Formula: see text] with a nontrivial new weak phase [Formula: see text], which is relevant to the Z′ contributions to the QCD penguin sector △C5, is needed to reconcile the observed discrepancy. Combined with the recent fitting results from B → πK, πK* and ρK decays, the Z′ parameter spaces are severely reduced but still not excluded entirely, implying that both the "ππ" and "πK" puzzles could be accommodated simultaneously within such a family nonuniversal Z′ model.

Publisher

World Scientific Pub Co Pte Lt

Subject

Astronomy and Astrophysics,Nuclear and High Energy Physics,Atomic and Molecular Physics, and Optics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0217751X11051573

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