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D-meson lifetimes within the heavy quark expansion

Lenz, Alexander; Rauh, Thomas

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Alexander Lenz

Thomas Rauh


Even if new data indicate that direct CP violation in D -meson decays is compatible with the standard model expectation, the first hints for direct CP violation have triggered a lot of interest, and charm phenomenology will remain an essential part of new physics searches due to its unique role as a probe for flavor-changing neutral currents among up-type quarks. Charm physics poses considerable theoretical challenges, because the charm mass is neither light nor truly heavy. The heavy quark expansion (HQE) provides a perturbative expansion in the inverse heavy quark mass for inclusive rates. It has proved to be very successful in the B sector, yet its validity for charm decays has often been questioned. We present results of a HQE study of D -meson lifetimes including NLO QCD and subleading 1/m c corrections. We find good agreement with experimental data, but with huge hadronic uncertainties due to missing lattice input for hadronic matrix elements.


Lenz, A., & Rauh, T. (2013). D-meson lifetimes within the heavy quark expansion. Physical Review D, 88(3), Article 034004.

Journal Article Type Article
Publication Date Aug 5, 2013
Deposit Date Jun 13, 2014
Publicly Available Date Jun 17, 2014
Journal Physical Review D
Print ISSN 1550-7998
Electronic ISSN 1550-2368
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 88
Issue 3
Article Number 034004


Published Journal Article (965 Kb)

Copyright Statement
Reprinted with permission from the American Physical Society: Alexander Lenz, Thomas Rauh, Physical Review D, 88, 034004, 2013. © 2013 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.

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