002745004 001__ 2745004
002745004 003__ SzGeCERN
002745004 005__ 20210210234603.0
002745004 0247_ $$2DOI$$9SISSA$$a10.22323/1.363.0198
002745004 0248_ $$aoai:inspirehep.net:1814170$$pcerncds:CERN$$pcerncds:CERN:FULLTEXT$$pcerncds:FULLTEXT$$qForCDS$$qINSPIRE:HEP
002745004 035__ $$9http://old.inspirehep.net/oai2d$$aoai:inspirehep.net:1814170$$d2020-11-18T16:18:28Z$$h2020-11-19T05:00:09Z$$mmarcxml
002745004 035__ $$9Inspire$$a1814170
002745004 041__ $$aeng
002745004 100__ $$aMartinelli, Guido$$iINSPIRE-00105171$$kORCID:0000-0002-9936-5872$$memail:[email protected]$$uINFN, Rome$$uRome U.
002745004 245__ $$9SISSA$$aReal photon emissions leptonic decays
002745004 260__ $$bSISSA$$c2019
002745004 300__ $$a7 p
002745004 520__ $$9SISSA$$aWe present a non-perturbative calculation of the form factors which contribute to the amplitudes for the radiative decays $P\to \ell \bar \nu_\ell \gamma$, where $P$ is a pseudoscalar meson and $\ell$ is a charged lepton. Together with the non-perturbative determination of the virtual photon corrections to the processes $P\to \ell \bar \nu_\ell$, this will allow accurate predictions to be made at $O(\alpha_{em})$ for leptonic decay rates for pseudoscalar mesons ranging from the pion to the $B$ meson. We are able to separate unambiguously the point-like contribution, the square of which leads to the infrared divergence in the decay rate, from the structure dependent, infrared-safe, terms in the amplitude. The fully non-perturbative, $O(a)$ improved calculation of the inclusive leptonic decay rates will lead to significantly improved precision in the determination of the corresponding Cabibbo-Kobayashi-Maskawa (CKM) matrix elements. Precise predictions for the emission of a hard photon are also very interesting, especially for the decays of heavy $D$ and $B$ mesons for which currently only model-dependent predictions are available to compare with existing experimental data.
002745004 540__ $$aCC-BY-NC-ND-4.0$$bSISSA$$uhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.fr
002745004 542__ $$f© The Authors
002745004 65017 $$2SzGeCERN$$aParticle Physics - Lattice
002745004 690C_ $$aCERN
002745004 700__ $$aDi Carlo, M$$uINFN, Rome$$uRome U.
002745004 700__ $$aMazzetti, F$$uINFN, Rome$$uRome U.
002745004 700__ $$ade Divitiis, G M $$uRome U., Tor Vergata$$uINFN, Rome2
002745004 700__ $$aDesiderio, A$$uRome U., Tor Vergata$$uINFN, Rome2
002745004 700__ $$aFrezzotti, R$$uRome U., Tor Vergata$$uINFN, Rome2
002745004 700__ $$aGarofalo, M$$uRome U., Tor Vergata$$uINFN, Rome2
002745004 700__ $$aHansen, M$$uINFN, Rome2$$uRome U., Tor Vergata
002745004 700__ $$aTantalo, N$$uRome U., Tor Vergata$$uINFN, Rome2
002745004 700__ $$aGiusti, D$$uRome III U.$$uINFN, Rome3
002745004 700__ $$aLubicz, V$$uRome III U.$$uINFN, Rome3
002745004 700__ $$aSachrajda, C T$$uSouthampton U.
002745004 700__ $$aSanfilippo, F$$uINFN, Rome3
002745004 700__ $$aSimula, S$$uINFN, Rome3
002745004 773__ $$01798219$$c198$$pPoS$$vLATTICE2019$$wC19-06-16$$y2019
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002745004 980__ $$aARTICLE
002745004 980__ $$aConferencePaper