Alexander Lenz
D-meson lifetimes within the heavy quark expansion
Lenz, Alexander; Rauh, Thomas
Authors
Thomas Rauh
Abstract
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.
Citation
Lenz, A., & Rauh, T. (2013). D-meson lifetimes within the heavy quark expansion. Physical Review D, 88(3), Article 034004. https://doi.org/10.1103/physrevd.88.034004
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 |
DOI | https://doi.org/10.1103/physrevd.88.034004 |
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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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