Warm up introduction of belle ckm analyses
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Warm-up Introduction of Belle CKM Analyses. Toru Iijima (Belle) / Nagoya ([email protected]). 2 nd Informal Vub Mini-Workshop @ Nagoya, May 30-31, 2002. A. f cp. B. e -2i f 1. A. B. Recent update of CP in B 0 Decays. Moriond ’02 Belle sin2 f 1 at 41.8 fb -1

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Warm-up Introduction of Belle CKM Analyses

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Warm up introduction of belle ckm analyses

Warm-upIntroduction of Belle CKM Analyses

Toru Iijima (Belle) / Nagoya

([email protected])

2nd Informal Vub Mini-Workshop @ Nagoya, May 30-31, 2002


Recent update of cp in b 0 decays

A

fcp

B

e-2if1

A

B

Recent update of CP in B0 Decays

Moriond ’02

Belle sin2f1 at 41.8 fb-1

= 0.82±0.12(stat.)±0.05(syst. )

w/ 1550 events

LP01

More than 6s

deviation from 0 !

0.99±0.14±0.06 @ 29.1fb-1 (LP01)

w/1137 events

“Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop


Belle sin2 f 1 w 41 8 fb 1

0.69

0.15

0.16

CP-1

CP+1

1.14

0.22

0.24

Belle sin2f1 w/ 41.8 fb-1

Statistical error only

“Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop


Present sin2 f 1 status

Present sin2f1 status

“Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop


Recent vub updates

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c

bu

b

HQE

Moriond’02

stat

sys

mod

Preliminary

DPF

w/ ISGW2

“Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop


Revival of inclusive measurements

0.1

1

0

–0.1

–0.2

–0.3

–0.4

–0.5

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

“Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop


Evidence of ds p

Evidence of Ds p ?

  • BaBar @ 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+ fp+ ) = ( 1.11  0.37  0.24 )  10-6

(*)25% uncertaintyfrom PDG BF(Ds+  fp+)

How about Belle’s status  Talk tomorrow…

“Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop


Present ckm constraint

Present CKM Constraint

Standard Constraints

(not including sin2)

A.Hocker

@FPCP

|Vcb*Vcd|~0.0092

“Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop


Luminosity at kekb

Luminosity at KEKB…

Lpeak = 7.249 ×1033cm-2s-1

Lday = 387 pb-1

Lint = 80.7fb-1

6.617

339.2

57.2at the time of 1st WS.

(PEP-II/BaBar:88.36fb-1)

“Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop


Belle ckm analysis

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 withFull 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)

“Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop


Purpose of mini workshop

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

“Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop


Notes

Notes

  • We ask each speaker to provide 1-2 page summary.

  • All slides will be posted on Web

    computer files: send it to [email protected]

    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 (18:30~)

    Staff: \2,000 / Student: \1,000

“Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop


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