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Search for Bs0â†Î+Î- and Bd0â†Î +Î- Decays in pp Collisions with CDF II

Physical Review Letters 95:22 (2005)

Authors:

A Abulencia, D Acosta, J Adelman, T Affolder, T Akimoto, MG Albrow, D Ambrose, S Amerio, D Amidei, A Anastassov, K Anikeev, A Annovi, J Antos, M Aoki, G Apollinari, JF Arguin, T Arisawa, A Artikov, W Ashmanskas, A Attal, F Azfar, P Azzi-Bacchetta, P Azzurri, N Bacchetta, H Bachacou, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, S Baroiant, V Bartsch, G Bauer, F Bedeschi, S Behari, S Belforte, G Bellettini, J Bellinger, A Belloni, E Ben-Haim, D Benjamin, A Beretvas, J Beringer, T Berry, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, A Bocci, A Bodek, V Boisvert, G Bolla, A Bolshov, D Bortoletto, J Boudreau, S Bourov, A Boveia, B Brau, C Bromberg, E Brubaker, J Budagov, HS Budd, S Budd, K Burkett, G Busetto, P Bussey, KL Byrum, S Cabrera, M Campanelli, M Campbell, F Canelli, A Canepa, D Carlsmith, R Carosi, S Carron, M Casarsa, A Castro, P Catastini, D Cauz, M Cavalli-Sforza, A Cerri, L Cerrito, SH Chang, J Chapman, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, I Cho, K Cho, D Chokheli, JP Chou, PH Chu, SH Chuang, K Chung

Abstract:

We report on a search for Bs0â†Î+Î- and Bd0â†Î+Î- decays in ppÂcollisions at s=1.96TeV using 364â€â€pb-1 of data collected by the CDF II detector at the Fermilab Tevatron Collider. After applying all selection requirements, we observe no candidates inside the Bs0 or Bd0 mass windows. The resulting upper limits on the branching fractions are B(Bs0↠Î+Î-)<1.5Ã-10-7 and B(Bd0â†Î+Î-) <3.9Ã-10-8 at 90% confidence level. © 2005 The American Physical Society.

The Growth, Polarization, and Motion of the Radio Afterglow from the Giant Flare from SGR 1806–20

The Astrophysical Journal American Astronomical Society 634:1 (2005) l93-l96

Authors:

GB Taylor, JD Gelfand, BM Gaensler, J Granot, C Kouveliotou, RP Fender, E Ramirez-Ruiz, D Eichler, YE Lyubarsky, M Garrett, RAMJ Wijers

Structure in the radio counterpart to the 2004 Dec 27 giant flare from SGR 1806-20

(2005)

Authors:

RP Fender, TWB Muxlow, MA Garrett, C Kouveliotou, BM Gaensler, ST Garrington, Z Paragi, V Tudose, JCA Miller-Jones, RE Spencer

Observation of the P11 state of charmonium

Physical Review D - Particles, Fields, Gravitation and Cosmology 72:9 (2005)

Authors:

P Rubin, C Cawlfield, BI Eisenstein, GD Gollin, I Karliner, D Kim, N Lowrey, P Naik, C Sedlack, M Selen, EJ White, J Williams, J Wiss, KW Edwards, D Besson, TK Pedlar, D Cronin-Hennessy, KY Gao, DT Gong, J Hietala, Y Kubota, T Klein, BW Lang, SZ Li, R Poling, AW Scott, A Smith, S Dobbs, Z Metreveli, KK Seth, A Tomaradze, P Zweber, J Ernst, AH Mahmood, H Severini, DM Asner, SA Dytman, W Love, S Mehrabyan, JA Mueller, V Savinov, Z Li, A Lopez, H Mendez, J Ramirez, GS Huang, DH Miller, V Pavlunin, B Sanghi, IPJ Shipsey, GS Adams, M Cravey, JP Cummings, I Danko, J Napolitano, Q He, H Muramatsu, CS Park, W Park, EH Thorndike, TE Coan, YS Gao, F Liu, M Artuso, C Boulahouache, S Blusk, J Butt, O Dorjkhaidav, J Li, N Menaa, R Mountain, R Nandakumar, K Randrianarivony, R Redjimi, R Sia, T Skwarnicki, S Stone, JC Wang, K Zhang, SE Csorna, G Bonvicini, D Cinabro, M Dubrovin, RA Briere, GP Chen, J Chen, T Ferguson, G Tatishvili, H Vogel, ME Watkins, JL Rosner, NE Adam, JP Alexander, K Berkelman, DG Cassel, V Crede, JE Duboscq, KM Ecklund, R Ehrlich, L Fields

Abstract:

The spin-singlet P-wave state of charmonium, hc(1P1), has been observed in the decay ψ(2S)→π0hc followed by hc→γηc. Inclusive and exclusive analyses of the M(hc) spectrum have been performed. Two complementary inclusive analyses select either a range of energies for the photon emitted in hc→γηc or a range of values of M(ηc). These analyses, consistent with one another within statistics, yield M(hc)=[3524.9±0.7(stat)±0.4(sys)]MeV/c2 and a product of the branching ratios Bψ(ψ(2S)→π0hc)×Bh(hc→γηc)= [3.5±1.0(stat)±0.7(sys)]×10-4. When the ηc is reconstructed in seven exclusive decay modes, 17.5±4.5 hc events are seen with an average mass M(hc)=[3523.6±0.9(stat)±0.5(sys)]MeV/c2, and BψBh=[5.3±1.5(stat)±1.0(sys)]×10-4. If combined, the inclusive and exclusive data samples yield an overall mass M(hc)=[3524. 4±0.6(stat)±0.4(sys)]MeV/c2 and product of branching ratios BψBh=[4.0±0.8(stat)±0.7(sys)]×10-4. The hc mass implies a P-wave hyperfine splitting ΔMHF(1P)M(13P)-M(11P1)=[1.0±0.6(stat) ±0.4(sys)]MeV/c2. © 2005 The American Physical Society.

The progenitor of SN 2005cs in the Whirlpool Galaxy

Monthly Notices of the Royal Astronomical Society: Letters Oxford University Press (OUP) 364:1 (2005) l33-l37

Authors:

Justyn R Maund, Stephen J Smartt, I John Danziger