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First observation of B̄s0→Ds±K and Measurement of the Ratio of Branching Fractions B(B̄s0→Ds±K)/ B(B̄s0→Ds+π-)

Physical Review Letters 103:19 (2009)

Authors:

T Aaltonen, J Adelman, T Akimoto, MG Albrow, B Álvarez González, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari, A Apresyan, T Arisawa, A Artikov, W Ashmanskas, A Attal, A Aurisano, F Azfar, P Azzurri, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, V Bartsch, G Bauer, PH Beauchemin, F Bedeschi, P Bednar, D Beecher, S Behari, G Bellettini, J Bellinger, D Benjamin, A Beretvas, J Beringer, A Bhatti, M Binkley, D Bisello, I Bizjak, RE Blair, C Blocker, B Blumenfeld, A Bocci, A Bodek, V Boisvert, G Bolla, D Bortoletto, J Boudreau, A Boveia, B Brau, A Bridgeman, L Brigliadori, C Bromberg, E Brubaker, J Budagov, HS Budd, S Budd, K Burkett, G Busetto, P Bussey, A Buzatu, KL Byrum, S Cabrera, C Calancha, M Campanelli, M Campbell, F Canelli, A Canepa, D Carlsmith, R Carosi, S Carrillo, S Carron, B Casal, M Casarsa, A Castro, P Catastini, D Cauz, V Cavaliere, M Cavalli-Sforza, A Cerri, L Cerrito, SH Chang, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, K Cho, D Chokheli, JP Chou, G Choudalakis, SH Chuang, K Chung, WH Chung, YS Chung, CI Ciobanu, MA Ciocci, A Clark, D Clark, G Compostella

Abstract:

A combined mass and particle identification fit is used to make the first observation of the decay B̄s0→Ds±K□ and measure the branching fraction of B̄s0→Ds±K□ relative to B̄s0→Ds+π-. This analysis uses 1.2fb-1 integrated luminosity of pp̄ collisions at s=1.96TeV collected with the CDF II detector at the Fermilab Tevatron collider. We observe a B̄s0→Ds±K□ signal with a statistical significance of 8.1σ and measure B(B̄s0→ Ds±K□)/B(B̄s0→Ds+π-)=0.097±0.018(stat)±0. 009(syst). © 2009 The American Physical Society.

The ATLAS Collaboration

Nuclear Physics A 830:1-4 (2009) 925-940

Authors:

G Aad, B Abbott, J Abdallah, AA Abdelalim, A Abdesselam, O Abdinov, B Abi, M Abolins, H Abramowicz, E Acerbi, BS Acharya, DL Adams, TN Addy, J Adelman, C Adorisio, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, H Ahmed, M Ahsan, G Aielli, T Akdogan, TPA Åkesson, G Akimoto, AV Akimov, MS Alam, MA Alam, J Albert, S Albrand, M Aleksa, IN Aleksandrov, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, M Aliyev, PP Allport, SE Allwood-Spiers, A Aloisio, R Alon, A Alonso, MG Alviggi, K Amako, C Amelung, VV Ammosov, A Amorim, G Amorós, N Amram, C Anastopoulos, CF Anders, KJ Anderson, A Andreazza, V Andrei, XS Anduaga, A Angerami, F Anghinolfi, N Anjos, A Antonaki, M Antonelli, S Antonelli, B Antunovic, F Anulli, G Arabidze, I Aracena, Y Arai, ATH Arce, JP Archambault, S Arfaoui, JF Arguin, T Argyropoulos, M Arik, AJ Armbruster, O Arnaez, C Arnault, A Artamonov, D Arutinov, M Asai, S Asai, R Asfandiyarov, S Ask, B Åsman, D Asner, L Asquith, K Assamagan, A Astbury, A Astvatsatourov, G Atoian, B Auerbach, E Auge, K Augsten, M Aurousseau

The CMS Collaboration

Nuclear Physics A 830:1-4 (2009) 946-956

Authors:

D Abbaneo, G Abbiendi, M Abbrescia, B Abelev, D Acosta, JG Acosta, O Actis, N Adam, W Adam, T Adams, MR Adams, A Adiguzel, V Adler, P Adzic, L Agostino, JL Agram, M Aguilar-Benitez, D Aharoni, M Ahmad, I Ahmed, S Ahuja, N Akchurin, B Akgun, U Akgun, IV Akin, E Alagoz, C Albajar, EA Albayrak, S Albergo, M Albrow, J Alcaraz Maestre, J Alexander, T Aliev, P Allfrey, N Almeida, G Altenhöfer, I Altsybeev, RL Alvarez, B Alver, G Alverson, GA Alves, M Alwarawrah, N Amapane, F Ambroglini, C Amsler, G Anagnostou, A Anastassov, M Anderson, J Andrea, V Andreev, Y Andreev, IM Anghel, L Antonelli, Z Antunovic, L Apanasevich, G Apollinari, A Aranyi, P Arce, R Arcidiacono, MW Arenton, H Arfaei, S Argiro, K Arisaka, M Arneodo, J Asaadi, MI Asghar, S Ashby, A Ashimova, A Askew, AC Assis Jesus, M Atac, O Atramentov, A Attikis, E Auffray, A Aurisano, C Autermann, P Avery, A Avetisyan, A Ayhan, I Azhgirey, T Aziz, P Azzi, P Azzurri, M Baarmand, J Babb, N Bacchetta, W Bacchi, M Bachtis, D Baden, P Baesso, S Baffioni, G Bagliesi, P Baillon, R Bainbridge, H Bakhshiansohi, MN Bakirci, JA Bakken, M Balazs, G Ball, A Ball

The LCFIVertex package: Vertexing, flavour tagging and vertex charge reconstruction with an ILC vertex detector

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 610:2 (2009) 573-589

Authors:

D Bailey, E Devetak, M Grimes, K Harder, S Hillert, D Jackson, T Pinto Jayawardena, B Jeffery, T Lastovicka, C Lynch, V Martin, R Walsh, P Allport, Y Banda, C Buttar, A Cheplakov, D Cussans, C Damerell, N De Groot, J Fopma, B Foster, S Galagedera, R Gao, A Gillman, J Goldstein, T Greenshaw, R Halsall, B Hawes, K Hayrapetyan, H Heath, J John, E Johnson, N Kundu, A Laing, G Lastovicka-Medin, W Lau, Y Li, A Lintern, S Mandry, P Murray, A Nichols, A Nomerotski, R Page, C Parkes, C Perry, V O'Shea, A Sopczak, K Stefanov, H Tabassam, S Thomas, T Tikkanen, R Turchetta, M Tyndel, J Velthuis, G Villani, T Wijnen, T Woolliscroft, S Worm, S Yang, Z Zhang

Abstract:

The precision measurements envisaged at the International Linear Collider (ILC) depend on excellent instrumentation and reconstruction software. The correct identification of heavy flavour jets, placing unprecedented requirements on the quality of the vertex detector, will be central for the ILC programme. This paper describes the LCFIVertex software, which provides tools for vertex finding and for identification of the flavour and charge of the leading hadron in heavy flavour jets. These tools are essential for the ongoing optimisation of the vertex detector design for linear colliders such as the ILC. The paper describes the algorithms implemented in the LCFIVertex package as well as the scope of the code and its performance for a typical vertex detector design. Crown Copyright © 2009.

SiD Letter of Intent

(2009)

Authors:

H Aihara, P Burrows, M Oreglia