CKM WS 2003 at Durham 1 Report on HFAG Y.Sakai (KEK) for HFAG

CKM WS 2003 at Durham 2 (General) Inherit activities of LEP HF Working group Role provide Averages for Conferences (up-to-date, including preliminary, often) PDG (published results) with “Consistent manner” (mentioned later) History - discussions at 1st CKM workshop (Feb-2002, CERN) - discussions at FPCP (May-2002, Philadelphia)  new HFAG (for ICHEP02, averages were provided with existing WGs) - Nov-2002: new HFAG started restructuring for Winter conference updates

CKM WS 2003 at Durham 3 (General 2) First averages from new HFAG for 2003 winter conferences Averages for PDG2003 (end March) B lifetimes,  md, semi-leptonic Br, sin2  …, rare-decay Br/Acp Web page : please surf [ (KEK mirror) ] Hope they serve as basis of discussions of WS

CKM WS 2003 at Durham 4 Organization Chairs : Daivid Kikby (BaBar) and Yoshi Sakai (Belle) HFAG members: contacts from BaBar,Belle,LEP,CLEO,CDF,D0,PDG Subgroups leader - B-lifetimes/Oscillations : O.Schneider (Belle) - Semi-leptonic (V cb,V ub ) : U.Langenegger (BaBar) - Rare- decay Br/Asymmetry : P.Chang (Belle) - UT-angles : A.Hoecker (BaBar) New !

CKM WS 2003 at Durham 5 Philosophy  use common input 'physics parameters' ex)  m d  B 0 lifetime  re-scale each result  take into account correlated systematic errors in av. 'physics parameter' uncertainty  sign of systematic error  use common method to extract 'physics parameter' ex) semi-leptonic Br  Vcb  follow PDG method for established averages (Br etc.) (updated averages) determine the Best Averages

CKM WS 2003 at Durham 6 Tools COMBOS (COMBine B OScillation results) - originally developed for oscillation average -  2 fit taking into account statistical uncertainties, correlated/uncorrelated sys. errors - extended to other averages  ex) Vcb try to use for other averages (UT-angles) [also, other utilities/programs are used]

CKM WS 2003 at Durham 7 B lifetime/Oscillation B lifetime, Oscillation,  groups: merged  B meson/baryon lifetimes: (L.Ciaccio  CDF)  B hadron fractions:  Oscillation frequency:  m d,  m s   :  s,  d Inputs to other subgroups Procedures: well established (except  d ) COMBOS based (specific prog. for b-fracton,  s )  d : new measurements available (D ELPHI, Ba B ar) |q/p|, CPTV parameters to be included O.Schneider (Belle) (F.Parodi, C.Weser) (O.Schneider)

CKM WS 2003 at Durham 8 B lifetime b hadron species average lifetime  B  ps B  ps  B s  ps  B c 0.46 ps  b  ps  b ,  b 0 mixture 1.39 ps b-baryon mixture  ps  b-hadron mixture  ps B0B   0.28 B Hadron Liftimes

CKM WS 2003 at Durham 9 mdmd mdmd  ps -1

CKM WS 2003 at Durham 10  m s and  s >14.4 ps -1 (95%CL)  s/  s <0.54 (95%CL)

CKM WS 2003 at Durham 11 Smileptonic Vcb and Vub working groups: merged Determine the best average values : semileptonic B decay branching ratios F(1)|Vcb|, |Vcb|, and |Vub| (Incl/Exclusive) Use a consistent approach (currently): - Consistent approaches in all the experiments based on the latest theoretical etc. developments - Checking consistency of results between the expts, - Evaluating the systematics common to all the expts, - Comparing the results of the different methods Trying to understand their theoretical errors How to control/minimize them [in discussion with theorists] This Workshop ! U.Langenegger (BaBar) V.Luth (BaBar) T.Iijima (Belle) M.Shapiro (CDF) M.Artuso (CLEO) P.Roudeau (DELPHI) E.Barberio (OPAL)

CKM WS 2003 at Durham 12 Smileptonic(2) Br: Inclusive B  X l  Exclusive B 0  D *- l Vcb : Exclusive B 0  D *- l Common inputs, systematics are identified newly f + /f 0 included use COMBOS Vcb : Inclusive use  SL [average of LEP and  (4S)]   : CLEO (b  s  spectrum, hadronic mass moment) Vcb = 40.7(1  exp   ’s  /m3 )x10 -3 

CKM WS 2003 at Durham 13 Br Br : Inclusive B  X l Exclusive B 0  D *- l

CKM WS 2003 at Durham 14 Vcb: exclusive Vcb : Exclusive B 0  D *- l

CKM WS 2003 at Durham 15 Vub No average is given (to be discussed at this Workshop) V ub

CKM WS 2003 at Durham 16 Rare Decay 1. Preliminary results reported in any conference with written documentation are accepted. 2. Average is performed using the PDG method. 3. The most stringent limit will be used for upper limits. 4. All central values will be used for the averages for decay channels observed by at least one experiment. Method 1. radiative and leptonic B decays: 2. hadronic B decays: 3. baryonic B decays: 4. Acp: Now available: (no decays with cham) (to be linked from HFAG web page) P.Chang (Belle) J.Smith (BaBar) J.Alexander (CLEO)

CKM WS 2003 at Durham 17 B+ charmless Compilation of B + Mesonic Branching Fractions Pre- Winter03

CKM WS 2003 at Durham 18 B0 charmless Compilation of B 0 Mesonic Branching Fractions Pre- Winter03

CKM WS 2003 at Durham 19 B+- DCPV Charmless Hadronic CP Asymmetries Pre- Winter03 BB B0B0

CKM WS 2003 at Durham 20 UT-angle  World averages for measurements related to angles of the Unitarity Triangle (~Time-dep. CPV)  related measurements in future  Effective UT angles (e.g.,  eff in B 0   +  - ): - no attempts are made at this early stage to derive angles if this requires input from QCD.  Interpretation of the results will be given at a future stage close collaboration with theorists has to be established Now available: (cc)K 0,  Ks,  ’Ks, K + K - Ks, J/  0, D *+ D *-, D *+ D -  +  -,  +  - - This Workshop A.Hoeker (BaBar) M.Shapiro (CDF) H.Evans (D0) J.Smith (BaBar) O.Long (BaBar) Y.Sakai (Belle)

CKM WS 2003 at Durham 21 sin2b Re-scaled to common inputs ( updated  m d,  B ) correlated sys. errors use COMBS sin2   

CKM WS 2003 at Durham 22 J/y p0: S, A B 0  J/  0 (=  A)

CKM WS 2003 at Durham 23 p;p-: Spp, App B 0   +   (2D averages with correlation) (=  A)

CKM WS 2003 at Durham 24 p+p-: d vs |P/T| givn (  ) measured S ,C  constraint on |P/T|, arg(T/P) had A(B 0   +  - ) = R u e i  T + R c P (top-loop eliminated using unitarity)

CKM WS 2003 at Durham 25 Dependencies b fractions B lifetime msms mdmd Br(b  cl ),V cb Br(b  ul ),V ub Time-dep CPV PDG: Br(D etc.) UT-angles  s Rare-decay Br/CPV

CKM WS 2003 at Durham 26 Summary New HFAG is now providing World Averages Hope they serve as basis of discussions Have useful feedback/interactions with experiment/theorists at this Workshop Web page: (KEK mirror) Please visit to take a look Welcome to use plots etc. for your convenience

CKM WS 2003 at Durham 27 current member list Jim Alexander (Cornell, CLEO) Marina Artuso (Syracuse, CLEO) Marco Battaglia (CERN, LEP) Elisabetta Barberio (CERN, LEP) Tom Browder (U.Hawaii, BELLE) Paoti Chang (NTU, BELLE) Hal Evans (Columbia, D0) Lawrence Gibbons (Cornell, CLEO) Andreas Hoecker (LAL-Orsay, BABAR) Toru Iijima (Nagoya, BELLE) David Kirkby (UC Irvine, BABAR) Urs Langenegger (SLAC, BABAR) Yoshi Sakai (KEK, BELLE) Olivier Schneider (U.Lausanne, BELLE) Marjorie Shapiro (LBL, CDF) Jim Smith (Colorado, BABAR) Achille Stocchi (LAL-Orsay, LEP) Weiming Yao (LBNL, PDG)