Experimental limits on weak annihilation contributions to decays

J L Rosner; N E Adam; J P Alexander; K Berkelman; D G Cassel; J E Duboscq; K M Ecklund; R Ehrlich; L Fields; L Gibbons; R Gray; S W Gray; D L Hartill; B K Heltsley; D Hertz; C D Jones; J Kandaswamy; D L Kreinick; V E Kuznetsov; H Mahlke-Krüger; T O Meyer; P U E Onyisi; J R Patterson; D Peterson; E A Phillips; J Pivarski; D Riley; A Ryd; A J Sadoff; H Schwarthoff; X Shi; S Stroiney; W M Sun; T Wilksen; M Weinberger; S B Athar; P Avery; L Breva-Newell; R Patel; V Potlia; H Stoeck; J Yelton; P Rubin; C Cawlfield; B I Eisenstein; I Karliner; D Kim; N Lowrey; P Naik; C Sedlack; M Selen; J J Thaler; E J White; J Wiss; M R Shepherd; D M Asner; K W Edwards; D Besson; T K Pedlar; D Cronin-Hennessy; K Y Gao; D T Gong; J Hietala; Y Kubota; T Klein; B W Lang; R Poling; A W Scott; A Smith; S Dobbs; Z Metreveli; K K Seth; A Tomaradze; P Zweber; J Ernst; K Arms; H Severini; S A Dytman; W Love; S Mehrabyan; J A Mueller; V Savinov; Z Li; A Lopez; H Mendez; J Ramirez; G S Huang; D H Miller; V Pavlunin; B Sanghi; I P J Shipsey; G S Adams; M Anderson; J P Cummings; I Danko; J Napolitano; Q He; H Muramatsu; C S Park; E H Thorndike; T E Coan; Y S Gao; F Liu; R Stroynowski; M Artuso; C Boulahouache; S Blusk; J Butt; J Li; N Menaa; R Mountain; S Nisar; K Randrianarivony; R Redjimi; R Sia; T Skwarnicki; S Stone; J C Wang; K Zhang; S E Csorna; G Bonvicini; D Cinabro; M Dubrovin; A Lincoln; A J Weinstein; R A Briere; G P Chen; J Chen; T Ferguson; G Tatishvili; H Vogel; M E Watkins; CLEO Collaboration

doi:10.1103/PhysRevLett.96.121801

Experimental limits on weak annihilation contributions to decays

Phys Rev Lett. 2006 Mar 31;96(12):121801. doi: 10.1103/PhysRevLett.96.121801. Epub 2006 Mar 28.

Authors

J L Rosner¹, N E Adam, J P Alexander, K Berkelman, D G Cassel, J E Duboscq, K M Ecklund, R Ehrlich, L Fields, L Gibbons, R Gray, S W Gray, D L Hartill, B K Heltsley, D Hertz, C D Jones, J Kandaswamy, D L Kreinick, V E Kuznetsov, H Mahlke-Krüger, T O Meyer, P U E Onyisi, J R Patterson, D Peterson, E A Phillips, J Pivarski, D Riley, A Ryd, A J Sadoff, H Schwarthoff, X Shi, S Stroiney, W M Sun, T Wilksen, M Weinberger, S B Athar, P Avery, L Breva-Newell, R Patel, V Potlia, H Stoeck, J Yelton, P Rubin, C Cawlfield, B I Eisenstein, I Karliner, D Kim, N Lowrey, P Naik, C Sedlack, M Selen, J J Thaler, E J White, J Wiss, M R Shepherd, D M Asner, K W Edwards, D Besson, T K Pedlar, D Cronin-Hennessy, K Y Gao, D T Gong, J Hietala, Y Kubota, T Klein, B W Lang, R Poling, A W Scott, A Smith, S Dobbs, Z Metreveli, K K Seth, A Tomaradze, P Zweber, J Ernst, K Arms, H Severini, S A Dytman, W Love, S Mehrabyan, J A Mueller, V Savinov, Z Li, A Lopez, H Mendez, J Ramirez, G S Huang, D H Miller, V Pavlunin, B Sanghi, I P J Shipsey, G S Adams, M Anderson, J P Cummings, I Danko, J Napolitano, Q He, H Muramatsu, C S Park, E H Thorndike, T E Coan, Y S Gao, F Liu, R Stroynowski, M Artuso, C Boulahouache, S Blusk, J Butt, J Li, N Menaa, R Mountain, S Nisar, K Randrianarivony, R Redjimi, R Sia, T Skwarnicki, S Stone, J C Wang, K Zhang, S E Csorna, G Bonvicini, D Cinabro, M Dubrovin, A Lincoln, A J Weinstein, R A Briere, G P Chen, J Chen, T Ferguson, G Tatishvili, H Vogel, M E Watkins; CLEO Collaboration

Affiliation

¹ Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.

PMID: 16605896
DOI: 10.1103/PhysRevLett.96.121801

Abstract

We present the first experimental limits on high-q2 contributions to charmless semileptonic decays of the form expected from the weak annihilation (WA) decay mechanism. Such contributions could bias determinations of /Vub/ from inclusive measurements of B-->Xulupsilon. Using a wide range of models based on available theoretical input we set a limit of GammaWA/Gammab-->u<7.4% (90% confidence level) on the WA fraction, and assess the impact on previous inclusive determinations of /Vub/.