| Domaine : |
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| Titre : |
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Impact of on the New Physics search in B→K⁎ℓ+ℓ− decay |
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| Auteur(s) : |
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Damir Becirevic1, Andrey Tayduganov1, 2 |
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| Laboratoire : |
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| équipe(s) de recherche : |
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Groupe Théorie |
| Résumé : |
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We discuss the uncertainty related to the amount of unwanted $B\to K_0^\ast (K\pi)\ell^+\ell^-$ events in the sample of $B\to K^\ast (K\pi)\ell^+\ell^-$. Those events can increase the measured differential decay rate by up to 10% in the low $q^2$ region, and can be a source of non-negligible uncertainty in the full angular distribution of the $B\to K^\ast (K\pi)\ell^+\ell^-$ decay. Although the transverse asymmetries should be unaffected by the presence of the $S$-wave $K\pi$ pairs, coming from the scalar $K_0^\ast$ meson, we show that in practice their normalization is sensitive to the those events and can entail a sizable uncertainty in transverse asymmetries around $q^2=2$ GeV. For other $q^2$'s that error is under about 10%. |
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Langue du texte
intégral : |
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Anglais |
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Date de production,
écriture : |
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17/07/2012 |
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| Journal : |
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| Nuclear Physics B (Nucl. Phys. B) |
| Publisher |
Elsevier |
| ISSN |
0550-3213 (eISSN : 0550-3213) |
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| Audience : |
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internationale |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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| Date de publication : |
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2012 |
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| Volume : |
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868 |
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| Numéro : |
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2 |
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| Page, identifiant, ... : |
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368-382 |
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| Référence interne : |
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LPT-ORSAY 12-79, LAL 12-274 |
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