Warm Up

1
Warm Up

• Toru Iijima
• Nagoya University

October 12, 2004
Belle Vxb workshop Determination of CKM Matrix
Elements Vub/Vcb at Belle.
2

• Welcome !
• We thank all of you to join this informal
  workshop.
• Special thanks to theorists from abroad
• I.Bigi, N.Uraltsev, M.Neubert, Z.Ligeti,
  M.Okamoto, H.N.Li, C.D.Lu

3
Success of B Factories

• First precise test of CKM picture for CPV.
• sin2f1 0.7260.037 is now a precise measurement
  (5).
• The other angles are becoming interesting.
• f2 from Srr and rp Dalitz
• 2f1f3 from B?D()p
• f3 from B?DK (w/ D Dalitz)
• side measurements too.
• Vcb, Vub. Dmd

Paradigm change look for Alternatives to
CKM Corrections by NP Need far precise tests
4
KM in This Room

• Both Kobayashi and Maskawa had undergraduate and
  graduate studies at Nagoya University (Sakata
  lab).
• PhD in 1967(Maskawa) and 1972(Kobayashi).

5
Belle CKM Analyses

• Inclusive semileptonic decays
• Exclusive semileptonic decays
• Hadronic decays
• Pure leptonic processes

Vub
Vcb
6
Tagging Strategy
S/N
Full recon.
Belle original
D() l n tag
advanced n recon.
Belle (mX,q2) PRL92,071802
trad. n recon.
Lum.
Eff.
7
Belle Semileptonic Analysis

• Inclusive B ? Xc l n
• Br T.Okabe, T.Iijima (Nagoya)
• El moments P.Urquijo, E.Barberio (Melbourne)
• Mx moments C.Schwanda (Vienna)

Vcb

• Exclusive B?Xc l n
• D() p l n T.Matsumoto (TMU)
• D.Liventsev (ITEP)

Shape fn. studies T.Nozaki (KEK) A.Limosani
(Melbourne)

• Inclusive B?Xu l n
• End-point A.Limosani (Melbourne)
• (Mx,q2) I.Bizjak (Lyubljana)
• I.Nakamura (KEK)

Vub review T.Nozaki (KEK) H.Kakuno (Tokyo)
K.Kinoshita (Cincinatti) I.Nakamura (KEK)
Vub

• Exclusive p l n / r l n
• D() l n tag T.Hokuue, T.Iijima (Nagoya)
• Partial tag L.Hinz (Lausanne)
• v-recon S.Cole, N.Parslow (Sydney)

8
Belle Leptonic Analyses

• B?en, mn N.Satoyama (Shinshu)
• B?eng, mng H.An, Y.Kwon (Yonsei)
• B?tn K.Ikado (Nagoya)

B?Dtn
Sensitive to fB x Vub in SM Sensitive also to NP
More and more importance in the next 5 years.
9
Purpose of the Workshop

• Interactions between Exp and Theory.
• Make clear the strategy for Vxb extraction
• ICHEP04
• ?Publication
• ?Coming years
• ?Super-B
• Find out
• Missing parts.
• Better idea.

Enjoy !