introduction to s and mixing wg meeting
Download
Skip this Video
Download Presentation
Introduction to  s and mixing WG meeting

Loading in 2 Seconds...

play fullscreen
1 / 4

Introduction to  s and mixing WG meeting - PowerPoint PPT Presentation


  • 74 Views
  • Uploaded on

b s and mixing meeting, March 12 th 2009. Introduction to  s and mixing WG meeting. Olivier Leroy. News. Moriond: no new Bs->JpsiPhi results from Tevatron Depsite ~10fb -1 on tape ! The road map (draft9=LHCB-ROADMAP3-001) was sent to EB on Feb 12

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Introduction to  s and mixing WG meeting' - atira


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide2
News
  • Moriond: no new Bs->JpsiPhi results from Tevatron
    • Depsite ~10fb-1 on tape !
  • The road map (draft9=LHCB-ROADMAP3-001) was sent to EB on Feb 12
    • Lively and constructive discussion on CDS (17 comments):
    • http://cdsweb.cern.ch/record/1161566
    • We are finalizing the answers and preparing the next draft
    • Everyone welcome to participate
    • Before sending new comments, please read:
      • The road map
      • Comments/answers already available
      • All the supporting notes: they contain much more details than the road map itself

Introduction to the beta_s and mixing WG meeting, March 12th 2009

still to be done
Still to be done
  • Long pending list of tasks here:
    • https://twiki.cern.ch/twiki/bin/view/LHCb/BetasManpower
  • In particular:
    • Background
      • Systematics due to background
      • Toy MC with non-flat angular background
      • Size of side-band needed to not be systematically dominated
        • Related to stripping (Greig, Marta)
      • Include min. bias additional background (K/pi decays in flight)
    • Selection optimization criteria
      • Minimizing (stat+syst) uncertainty on betas in practice
        • No simple mathematical formula to maximize available yet: many compromises
      • Alternative selection with lifetime biased cut allowed
    • Beta_s sensitivity with low integrated luminosity (Basem)
      • Point estimate not reliable with low integrated luminosity (as CDF observed)
      • Need to construct confidence region to quote first results
    • Understanding proper time / angular acceptance shapes (Yuehong, Basem)
    • Same side tagging
    • Simplified analysis with first data:
      • One angle analysis (acceptance of the 2 other angles?)
      • Untagged analysis
    • S-wave (Yuehong, Concezio, …)
    • Pure CP-even mode studies (Liming)
    • ...

Introduction to the beta_s and mixing WG meeting, March 12th 2009

supporting notes for the road map
Supporting notes for the road map
  • Submitted to EB:
    • G. Lanfranchi et al. “Lifetime Unbiased Selection of Bs->J/Psi Phi and relatedcontrol channels: Bd->J/Psi K* and B+->J/Psi K+”
    • T. du Pree et al. “Methods for Angular Analyses of B->J/psiX” 
  • Draft1 circulating within CP WG:
    • M. Calvi et al. “Flavour tagging calibration of \BsJphi\, \BdJKst\ and \BuJK\ channels”
    • C. Langenbruch et al. “Fit Bs->JpsiPhi”
    • C. Linn et al. “Time and angular analysis of Bd->JpsiK*”
    • C. Gobel, M. Calvi et al. “sin2beta”
    • G. Conti, A. Hicheur, “Trigger preselection of B->JpsiX channels”
  • Not yet ready:
    • S. Vecchi et al., “Systematics error on proper time and backgroundfractions”
    • A. Hicheur et al., “Jpsi(ee)Phi offline + trigger sel”
    • Y. Xie et al., “KK S-wave”
    • Note on Dms and Same side kaon ? no draft, no schedule ?

Introduction to the beta_s and mixing WG meeting, March 12th 2009

ad