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Languages : en
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The direct CP asymmetry in the untagged inclusive channel [bar B] [yields] X[sub s+d] [gamma] provides a strict test of the standard model. It has been shown beyond the partonic level that this asymmetry is negligibly small thanks to U-spin relations and to the unitarity of the CKM matrix. In the present paper we investigate this relation beyond the SM; in particular, we analyze to which extent deviations from this prediction are possible in supersymmetric scenarios. We analyze the minimal flavour violation scenario, including tan [beta]-enhanced terms and using the complete two-loop renormalization group running. Our analysis fully takes into account also the EDM constraints on the supersymmetric phases. We investigate possible correlations between the tagged and the untagged CP asymmetries and the indirect sensitivity of the latter to the [bar B] [yields] X[sub d] [gamma] CP asymmetry. Furthermore, we derive general model-independent formulae for the branching ratios and CP asymmetries for the inclusive [bar B] [yields] X[sub d] [gamma] and [bar B] [yields] X[sub s] [gamma] modes, and update the corresponding SM predictions.

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Languages : en
Pages : 5

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Book Description
The direct CP asymmetry in the untagged inclusive channel {bar B} → X{sub s+d} [gamma] provides a strict test of the standard model. It has been shown beyond the partonic level that this asymmetry is negligibly small thanks to U-spin relations and to the unitarity of the CKM matrix. In the present paper we investigate this relation beyond the SM; in particular, we analyze to which extent deviations from this prediction are possible in supersymmetric scenarios. We analyze the minimal flavour violation scenario, including tan [beta]-enhanced terms and using the complete two-loop renormalization group running. Our analysis fully takes into account also the EDM constraints on the supersymmetric phases. We investigate possible correlations between the tagged and the untagged CP asymmetries and the indirect sensitivity of the latter to the {bar B} → X{sub d} [gamma] CP asymmetry. Furthermore, we derive general model-independent formulae for the branching ratios and CP asymmetries for the inclusive {bar B} → X{sub d} [gamma] and {bar B} → X{sub s} [gamma] modes, and update the corresponding SM predictions.

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Languages : en
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We describe a measurement of the direct CP asymmetry between inclusive b [yields] s[gamma] and [bar b] [yields] [bar s][gamma] decays. This asymmetry is expected to be less than 0.01 in the Standard Model, but could be enhanced up to about 0.10 by new physics contributions. We use a sample of 89 million B[bar B] pairs recorded with the BABAR detector at PEP-II, from which we reconstruct a set of 12 exclusive b [yields] s[gamma] final states containing one charged or neutral kaon and one to three pions. We measure an asymmetry of A[sub CP] (b [yields] s[gamma]) = 0.025 [+-] 0.050(stat.) [+-] 0.015(syst.), corresponding to an allowed range of -0.06

Author: Chretien de Troyes
Publisher: Yale University Press
ISBN: 0300038380
Category : Poetry
Languages : en
Pages : 244

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A twelfth-century poem by the creator of the Arthurian romance describes the courageous exploits and triumphs of a brave lord who tries to win back his deserted wife's love

Author: Bennett H Wall
Publisher: Hassell Street Press
ISBN: 9781015031500
Category :
Languages : en
Pages : 32

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This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.