Warmup Introduction of Belle CKM Analyses

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Warm-upIntroduction of Belle CKM Analyses

• Toru Iijima (Belle) / Nagoya
• (iijima_at_hepl.phys.nagoya-u.ac.jp)

2nd Informal Vub Mini-Workshop _at_ Nagoya, May
30-31, 2002
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Recent update of CP in B0 Decays

• Moriond 02
• Belle sin2f1 at 41.8 fb-1
• 0.820.12(stat.)0.05(syst. )
• w/ 1550 events

LP01
More than 6s deviation from 0 !
0.990.140.06 _at_ 29.1fb-1 (LP01) w/1137
events
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Belle sin2f1 w/ 41.8 fb-1
Statistical error only
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Present sin2f1 status
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Recent Vub Updates

• CLEO end-point analysis b?sg shape function
  (hep-ex/0202019)
• BaBar/Belle exclusive
• BaBar (rln)
• Belle (rln)
• CLEO(rln)

stat
1/mb
fu
HQE
LEP HF Working Group
exp
b?u
HQE
?b
b?c
Moriond02
stat
sys
mod
Preliminary
DPF
w/ ISGW2
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Revival of Inclusive Measurements

• Measurements of parameters in theory calculation
• ?Better determination of Vcb, Vub w/ inclusive
  decays.

b?c inclusive Mx moment
Vcb
b?sg Eg moment
Vub
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Evidence of Ds p ?

• BaBar _at_ Moriond 02

14.9 ? 4.1 events
D- r
D- p
Evidence of reflected Ds?D background
significance of the signal 3.5 s

• Systematic error mostly from uncertainty on BF of
  secondary decays, peaking background uncertainty,
  selection criteria

Preliminary
BF( B0 ? Ds p- )() ( 3.1 ? 1.0 ? 1.0 ) ?
10-5 BF( B0 ? Ds p- ) ? BF(Ds ? f p ) (
1.11 ? 0.37 ? 0.24 ) ? 10-6
() 25 uncertainty from PDG BF(Ds ? f p)
How about Belles status ? Talk tomorrow
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Present CKM Constraint
Standard Constraints (not including sin2?)
A.Hocker _at_FPCP
VcbVcd0.0092
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Luminosity at KEKB
Lpeak 7.249 1033cm-2s-1 Lday 387 pb-1 Lint
80.7fb-1
6.617 339.2 57.2 at the time of 1st WS.
(PEP-II/BaBar88.36fb-1)
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Belle CKM Analysis

• CKM analysis group conveners Y.Kwon, T.Iijima
• Vcb related subjects
• D l n (J.W.Nam, SKKU)
• D l n (H.K.Jang, SNU)
• Lepton inclusive (K.Yoshida, Nagoya)
• Vub related subjects
• Inclusive semileptonic decays
• End-point analysis (A.Limosani, Melborune)
• Mx (q2) measurement with Full recon tag.
  (Slovenia others)
• Neutrino recon tag. (H.Kakuno, TIT)
• D() l n tag. (A.Sugiyama, Nagoya)
• Exclusive semileptonic decays (p l n, r l n)
• Heejong Kim (Yonsei), J.W.Nam(SKKU),
  C.Schwanda(KEK), M.Gobinda(Tata),
• Hadronic decays Ds p (D.W.Kim, SKKU)
• Ds Xu w/ pseudo recon. (C.Everton, Melborune)
• Ds inclusive (Y.Mikami, Tohoku)
• Leptonic decays (B? l n)
• B? e n, m n (H.W.Kim, Korea)
• B? t n (Liventsev, ITEP)

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Purpose of mini-Workshop

• Enhance discussion with theorists.
• for experimentalists, learn about theoretical
  aspects
• for theorists, learn about experimental issues
• Better idea
• Make clear the present achievement
• signal-to-noise, efficiency
• events / fb-1
• Experimental errors (statistical and systematics)
• Extrapolate to 100fb-1/300fb-1..., and make clear
  the
• prospect toward Summer 2002 and beyond..
• Discuss how to extract Vub from the measurement,
  and how to treat the error.
• List up whatever you want to discuss with
  theorists.
• Others

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Notes

• We ask each speaker to provide 1-2 page summary.
• All slides will be posted on Web
• computer files send it to sugi_at_hepl.phys.nagoya-
  u.ac.jp
• hard copy give them to a student for scan
• This building is locked in the night
• Ask a Nagoya staff/student how to enter (4 digit
  key code)
• Terminal limited number of terminal available.
• Ask a Nagoya staff/student
• We will have a BBQ party (1830)
• Staff \2,000 / Student \1,000