Gang RONG. Institute of High Energy Physics, CAS. November 27, BES BELLE CELO BABAR 2007 Joint Workshop on Charm Physics

Transcription

1 Charm cays and Ψ(377 non- cays at BESII & BESIII Gang RONG Institut of High Enrgy Physics, CAS Novmbr 7, 7 BES BELLE CELO BABAR 7 Joint Workshop on Charm Physics Nov. 6 7, 7, IHEP, Bijing, China 1

2 OUTLINE Som rsults on and ψ(377 dcays from BESII Purly lptonic dcay and f Smilptonic dcays, CM matrix lmnts, and tst for Isospin consrvation Inclusiv masurmnts cross sction R masurmnts in ψ(377 rgion ψ(377 and ψ(3686 Rsonanc Paramtrs Inclusiv non- branching fractions Exclusiv non- dcay J/ψ,... Prospcts of Charm Physics at BESIII Prcision Masurmnts Prob for Nw Physics Rlatd Topics Pur lptonic dcays Smilptonic dcays Absolut Hadronic Branching fractions Cabibbo Supprssd cays alitz Plot Analysis Mixing,CP Violation,Rar cays Linshap Analysis,

3 World ψ(377 Sampls (pb -1 3 pb -1 by summr, World ψ(377 Sampls (pb -1 MAR-I ELCO MAR-II MAR-III BES-II CLEO-c BES-II ata Sampls about 17.3 pb -1 data takn at GV ~7 pb -1 data takn from GV to GV ~8 pb -1 data takn from to GV about 6.5 pb -1 data takn at 3.65 GV about 1 pb -1 data takn at GV cross sction scan data BESII ψ(377 data sampl of about 33 pb -1 3

4 Purly lptonic dcay at BESII Δ f / f = 33 % 4-3 BES first obsrvd no ambiguity signal 4 of purly lptonic dcay of moson

5 Purly lptonic dcay at BESII CELO-c CELO-c xpcts to improv f masurmnt at an accuracy of 5% with 75 pb -1 of ψ(377 data Δ f / f = 8 % BES-III will improv f masurmnt at an accuracy of 5 % with 4 fb -1 of ψ(377 data

6 Smilptonic dcays at BESII Why intrstd in th Smi-lptonic dcays of msons? To masur th standard modl paramtrs V cs, V cd Probing th hadronic currnt Undrstand th dynamics of smilptonic dcays Th paramtrs of Standard Modl ar: α, GF, sin θ w, M H,frmion mass and mixings ' d Vud Vus Vub d s ' = Vcd Vcs Vub s ' b Vtd Vts CM Vtb Wak Mass ignstats ignstats Th 4 quark mixing paramtrs ( λ, A, ρ, η rsid in CM matrix Qustions: os th CM fully xplain quark mixing? CP Violation? To dtct Nw Physics in flavor chang sctor, on must know th CM wll b dγ( dq Form Factor Plν G 4 Pl ν F 3 = p V f ( q 3 P cq Absolut branching fractions giv dirct masurmnts of th CM matrix lmnts 6 V cd & V cs and form factors

7 Smilptonic dcays at BESII ν (found in REC of tags. CM matrix lmnts Form factors Br( ν (found in REC of tags. ν BESII(% CLEO(% 3.83±.4± ±.1±.1 PLB597(439 Br( ν.33±.13±.3.6±.5±.8 PRL95(

8 Γ( Smilptonic dcays at BESII Th long-standing puzzl of : whthr th Isospin consrvation holds in th xclusiv smi-lptonic dcays of msons? ν / Γ( ν = 1??? PLB 644 (7 BESII rsults support that Isospin Consrvation holds in xclusiv smilptonic dcays of msons, Solv th longstanding puzzl in cays. BESII rsults support that Isospin Consrvation holds in xclusiv smilptonic dcays of msons CLEO-c confirmd th BES-II rsult Γ( Γ( ν 8 = 1.±.5±.4 ν

9 9 Charm Physics - μ Xand X B[%] B[%] l X l X μ X ± ± ±.7.7± X ±.7.7± ±.9.9± ( ( ± ± = Γ Γ X X ( ( ± ± = X BF X BF ( ( ± ± = X BF X BF μ μ (PG6..54 ± = τ τ PLB 658 (7 1 Prliminary Th rat of (misidntifying th particl I as j First masurmnt = ral k ral ral μ ral k μ k k k μ k μ μ μ k μ μ μ obs k obs obs μ obs N N N N ε ε ε ε ε ε ε ε ε ε ε ε ε ε ε ε N N N N k k

10 Charm Physics - X PLB 65 (5 196 Improvd & First masurmnts B[%] X PLB 658 (7 1 X X 3.5 ±.7 ± ±.9 ±.4 PLB 643 ( X 57.8 ±1.6 ± ±1.3 ±1. / bar X 47.6 ±4.8 ± ±5.5 ±3.3 * X.8 ±1. ± ±.(<6.6@9% * bar X 8.7 ±4. ±1. 3. ±4.5 ±3. * X <.3 ( <.3 (@9% * - X 15.3 ±8.3 ± ±5. ±.7 1

11 Charm Physics- cross sction L = of GV Singl tag mthod pb Using inmatic fit mthod to improv momntum rsolution and slct th singly taggd mson Obsrvd cross sctions for -bar production at GV σ σ σ = 3.58 ±.9 ± obs obs obs = =.56 ±.8 ± 6.14 ±.1 ±.6.5 PLB 63( nb nb nb σ obs = N tag L Br ε - X - tag Rquiring - 11 M fit = M X

12 Charm Physics- cross sction oubl tag mthod An absolut masurmnt obs σ = 3.47 ±.3 ±.1 nb obs σ obs σ = =.46 ±.33 ± 5.93 ±.46 ±. nb.35 nb Nucl. Phys. B 77 (

13 ψ and ψ rsonanc paramtrs Lin-Shap and Rsonanc Paramtrs of ψ(377 and ψ(3686 ψ(3686 Mar., 3 data ψ(377 ψ(3686 To masur th rsonanc paramtrs of ψ(377 or ψ(3686, on had bttr to simultanously fit ψ(3686 and ψ(377 rsonancs, sinc thr ar strong corrlations btwn th fittd paramtrs of th two rsonancs. If on do not considr th ffcts of vacuum polarization corrctions on th obsrvd cross sctions in th data rduction, th total width of ψ(3686 would dcras by about 4 kv! PRL 97 ( Mainly du to vacuum polarization corrctions Aftr subtraction of ψ(3686, ψ(377 and J/ ψ from th obsrvd cross sctions, on obtains th xpctd cross sctions of th continuum hadron production. 13

14 ψ and ψ rsonanc paramtrs Comparison of ψ(377 Rsonanc Paramtrs M ψ ( 377 ΔM = M M ψ ( 377 ψ (S tot Γ ψ ( 377 Γ ψ ( 377 prd σ ψ ( 377 = 9.63 ±.66 ± s = MV.35 R uds =.6 ±.54 ±.19 PRL 97 ( nb obs σ ψ obs σ ψ ( 377 = 6.94 ±.48 ± s = MV which is consistnt within rror with ( 377 = 8.1 ± s = MV 1.56 nb.8 nb 14 obtaind basd on PG4 paramtrs

15 ψ and ψ rsonanc paramtrs Comparison of ψ(3686 Rsonanc Paramtrs Obtaind basd on cross sction scan xprimnt M ' ψ (MV tot Γ ' ψ (kv Γ ψ ' (kv E ±.1±.3 36 ± 36± 16 BES-II PG4 BES-II [Mar. 3 data] PRL 97 ( N / A ± ±. ± ± 64±.44± ±.1 ±. 1 ±.33±.4±. 11 Taking into considration th ffct of vacuum polarization corrction on th masurd paramtrs 15 for th first tim in th nrgy scan xprimnt.

16 ψ(377 rsonanc paramtrs Prcision Masurmnts of th Mass, Total and Lptonic Widths of ψ(377 PLB65(738 c., 3 data Mar., 3 data c., 3 data Mar., 3 data c., 3 data Mar., 3 data c., 3 data PRL 97 ( PLB 65 (7 38 c., 3 data B [( ψ ( 377 B [ ψ ( 3686 ] = (.74 ±.1 ± ] %

17 ψ and Cross sction Comparison of ψ(377 cross sction Obtaind basd on rsonanc paramtrs Comparison of cross sction ( s = GV ( s = GV ( s = GV PLB 63 (4 13 ( s = GV ( s = GV NPB 77 (5 395 ( s = GV obs σ ψ ( 377 [nb] Masurd cross sction basd on th data takn at GV and at 3.66 (or 3.67 GV σ obs [nb] 17 My stimation only, Input with PG6 Br

18 Masurmnts of R had,r uds(c and R uds(cψ(377 PRL 97(6 61 PLB 641 (6 145 continuum R uds(c R Ψ(377 hadrons R uds R had 18

19 Masurmnts of R had,r uds(c and R uds(cψ(377 R ( ( s R (377( s R uds ( c ψ (377( s = uds c ψ R uds abov cc-bar thrshold blow cc-bar thrshold R uds hadrons R uds =.134±.5±.85 Blow -bar thrshold R pqc uds =.15±.3 Masurd R uds for th first tim in this nrgy rgion. calculat α s (s R had (s=r uds(c (sσr rs,i (s, R rs,i (s is R valus du to all 1 -- rsonancs dcay to hadrons xcpt Ψ(377. R had hadrons calculat α ( M QE Z a μ = ( g μ / 19

20 Masurmnts of B[Ψ(377non] From -bad PLB641, 145 PRL97,1181 Accptd by PR Accptd by PLB B(ψ [%] 49.9± ± ± ± B(ψ - [%] 35.7± ± ±3.7 ± B(ψ [%] [%] 85.5± ± ±7.3 ± ±5. 5.± ±5. 5.6±1.8 B(ψ non non-[%] 14.5± ± ±7.3 ± ±5. 5.± ±5. 5.6±1.8 Ruds.18±.19.19± ±.54.54± ±.31.31± ±..47± σ obs ψ(377 [nb nb] 7.18±..± ±.48.48± ±.36.36± σ non [ nb] ±.35.35±.9 σ [nb] ±..4± ±.37.37±

21 Ψ(377 J/ψ ± 4.8 BES-II mainly ψ(377 J/ψ It is an intrsting qustion whthr hadronic transitions insid th ψ(377 xist. Ys BES-II obsrvd th first non- vnts of ψ(377 dcays. CLEO-c conformd th BES obsrvation of th non- dcay. BF ( ψ (377 J / ψ = (.34 ±.14 ±.9% BF ( ψ (377 J / ψ = (.189 ±..7.4 BES-II % CLEO-c Th two masurmnts ar consistnt within th rrors. PLB 65 (563 PRL96,84(6 1

22 No obvious cross sction discrpancy at th two nrgy points is obsrvd. Howvr, to xtract th non--bar BFs of ψ(377 dcays, on nds to considr th intrfrnc btwn th two amplituds of th continuum and th rsonancs, and to considr th diffrnc of ISR & vacuum polarization corrctions at two nrgy points. Othr Charmlss cays Uppr limits ar st at 9% CL PLB65(7111,PLB656(73,EPJC5(785 Mod σ [pb] σ 3.65 [pb] B up [ 1-3 ] φ <3.5 <8.9 <.5 φη <1.6 <18. <1.9 ( ± ± ± ± < ± ± ± ± <4.8 φ - <11.1 <.9 <1.6 ( 19.9± ±.1 4.1± ±.6 <1.7 φ 15.8± ± ±9. 9.±.. <.4 pp bar - 33.± ± ± ±4.8 <1.6 pp bar 7.1±..± ± ±.7 <1.1 φpp bar <5.8 <9.1 <.9 3( ± ± ± ± <9.1 ( - η 153.7± ± ± ±1.4 <4.3 ( - 8.9± ± ± ± < ±6. 6.±.9.9.8± ±7. <11.1 ( 18.1± ±.1 <3. <4.6 pp bar 1.1±..±1. 9.± ±1. <1. pp bar ±9. 9.±6.8 9.± ±3.7 <7.3 3( ± ± ± ± <13.7 Mod σ [pb] σ 3.65 [pb] B up [ 1-3 ] - ( ± ± ± ±3. <1.3 ( ± ±1.7 <49.1 <3. pp bar ( ( - 3.5±5. 5.±3.5.8± ±3.4 <.6 4( ± ± ± ±13.9 < ( ± ± <375. <5. 4( - <6.9 <119.4 <3.6 ρ ± ± ± ± <6.9 ρ - 34.± ± ± ±6.3 <5. ρ pp bar 13.1±3. 3.± ±6. 6.±.8.8 <1.7 * ± ± ± ±14.4 <9.7 ΛΛ bar <.5 <6.1 <.4 ΛΛ bar - <6.7 <4.9 <4.4 ω - <37.1 <5.8 <5.5 ω - <44.4 <53. <6.6 ωpp bar <.3 <3.9 <3. φ - <5.5 <66.7 <3.8 * ± ± ± ±17.9 <16.3 * ± ± ± ±8. <3.4 - ρ < ± ±1.7 <.8 - ρ - 94.± ± ± ±19.7 <14.6 ΛΛ bar <7.9 <1.4 <1.

23 Charm Physics at BESIII 3

24 Prcision masurmnts Why ar w intrstd in Charm? Charm plays an important rol in undrstanding th SM (standard modl dynamics in two rspcts: Prcision masurmnts of dcay constants f, f s, form-factors of smilptonic dcays of Charm msons provid th calibration of Lattic QC calculation. In turn, th vry prcis calculation of th ratios of ths dcay constants f /f B, f s /f Bs and form-factors from LQC support masurmnts for B physics. Th paramtrs of Standard Modl ar: Th 4 quark mixing paramtrs α, G sin θ, M,frmion mass and mixings ( λ, A, ρ, η rsid in CM matrix F, w H Wak ignstats CM Mass ignstats CM To undrstand th quark mixing and CP violation in SM, and dtct Nw Physics in flavor 4 chang sctor, on must dtrmin th CM lmnts as prcisly as possibl!

25 Why ar w intrstd in Charm? 5

26 Why ar w intrstd in Charm? Probs for Nw Physics Masurmnts of som transition rats of Charm provid probs for Nw Physics. In th SM, th mixing, CP violation and rar dcays of charm ar all small. Howvr, som Nw Physics ffcts byond th SM can nhanc th mixing, th CP violation and th rar dcays. So sarch for th mixing, th CP violation and th rar dcays provid th uniqu opportunitis to sarch for Nw Physics byond th SM indirctly. 6

27 Mont Carlo sampls Gnratd.8 fb GV with BOSS6.. Gnratd 1. fb GV with BOSS6.1. BES-III softwar ψ (377 Gnratd Mont Carlo vnts l ν l ν l l ν l l Charg conjugation μ ν μ l ν l l ν l * l ν l Charg conjugation Full simulation 7

28 Absolut Branching Fractions at BESIII B( o - oubl tag analysis, Indpndnt of Luminosity and cross sction in th doubl tag masurmnts M bc M bc M BES III MC bc ( L = 8 M bc pb 1 N tag N ( ε = B( = 433 ± 74.4% B ( = 3.8% δb / B = M bc 75 = 135 ± 15 = (3.83±.4% (MC INPUT 8.5% / 4 fb 1

29 Absolut Branching Fractions at BESIII B( Κ - Indpndnt of Luminosity and cross sction in th doubl tag masurmnts M BES III MC bc M bc ( L = 8 pb N tag = 1588 ± 44 N ( = 813 ± 1 ε = 54.% M bc B( = (9.48±.1% B ( = (9. ±.6 % 1 δb / B = (MC INPUT 9.5% / 4 fb 1

30 Pur lptonic dcays at BESIII BES III Full MC simulation Singly taggd - sampls N tag =3541± os not us μ Information M bc Mont Carlo Sampl for 1 fb -1 Bam Constraint Mass M bc B( = E μ ν bam Us μ Information 19 signal vnts μ = p N( N tag mn ε μ ν μ μ ν μ 135 signal vnts μ ν U = E P miss= EmissPmiss miss miss miss U 3

31 Smilptonic dcays at BESIII BES III Full MC simulation Mont Carlo Sampl for.8 fb -1 N( ν = 558± 8 ν U miss = E miss P mis N( ν = 77 ± 9 ν ν M BC N tag = ± 6 Singly taggd bar sampls U miss = E miss P mis 31

32 Statistical rror only Mod -1 δ B / B (4 fb -1 B / B ( fb ν μ ν μ ν μ ν f Mod S S Prcis Masurmnts at BESIII S S f S φ φ ν ν μ ν τ ν Rlativ rror (% on th masurmnts 81 pb δ δb / B (PG 4 CLEO-c 4.. ~ δ B / B (4.3GV δ B / B (4.17GV δb / B (PG On yar data taking 4fb -1 CLEO-c ~ pb -1 3

33 cay rats rlats to CM Matrix lmnts and form fator dγ( Plν G B( ν F 3 = p Γ( ν = = 1.53 V 3 P Vcq f ( q dq 4 τ B( ν Γ( ν = = 3.1 V f ( f τ ( q = 1 q / m Δ V cq ΔB Δτ Δf = V B τ cq f 1. Wll masurd lif tims of msons from PG6 Δ τ =.4% τ. With 4 fb -1 Ψ(377 data at BESIII Δ B B Prcis Masurmnts at BESIII stat. ~ pol.7 %, 1.8 % 3.Form factor from thory (Lattic QC. Assuming Δf/f ~1.5%. Quark modls, HQET, Lattic & othr mthods hav all bn invokd to calculat form factor absolut normalizations. Ths calculations hav bn don mostly at q = or q =q max. (i. w=1, just lik F in V cb in B * lν ΔVcd/Vcd ~1.8% cs cd f f ( ( l ν 1 1 ΔVcs/Vcs ~1.6% l ν Κ Grat contribution to CM Unitarity s s 1 1 To xtract V cs & V cd nd form factor from thory at on fixd q point. BESIII: L=4 fb 1 ψ(377 MC simulation

34 Prcis Masurmnts at BESIII Masurmnts of B ( l X ( l =, μ c W l v l B( X B( X (, S q q q ( S c d ( s Vcd cs or V W l ν l B( μ X B( μ X CLEOc s rsults ar not usd in PG6 avrag hadrons with th BES-III dtctor, w may hav th opportunity to study ths dcays, to chck: Γ SL ( Xl v = Γ l?? SL ( Xl v = Γ l SL ( S Xl v l ΔB/B[%] Currnt Exp. BESIII [4 fb -1 ] X.6% ~.3% X 1.3% ~.3% μ X % ~1.% 34 μ X 15% ~1.%

35 Prcis Masurmnts at BESIII A short summary on th Absolut Masurmnt Aftr CLEO-c, th accuracy on th absolut masurmnts still nds to b improvd. Why is it so important? 1 Form factors in smi-lptonic dcays & dcay constants f and f s can b usd to calibrat Lattic QC calculations. [ f = 35 ± 8 ± 14 MV LQC] [ Δ f / f = 7% LQC] Prcis masurmnts of inclusiv smilptonic branching fractions liftims of msons to undrstand dcay mchanism. 3 Enginring masurmnts a trmin production rat of charm in B dcays. b Ralism of MC gnrator & BC subtraction whn looking for Nw Physics in gnral. CELO-c xpcts to improv f masurmnt at 5% with 75 pb -1 of ψ(377 data BES-III can improv f masurmnt at ~% accuracy lvl with 4 fb -1 of ψ(377 data; and improv f s masurmnt at 1.3% accuracy lvl with 4 fb -1 of 35 ψ(417 data

36 Mixing at BESIII Th kinds of th box diagrams lad to th stimat: R mix ~1-7 SM might allow for R mix ~1-3 [I. Bigi] BES-III Snsitivity for R mix : ~7.5x1 4 with 4 fb 1 mixing : Chang of idntity du to fb -1 vs background vnts ar obsrvd M vs BC 13 right sign tags R mix x y x Δ M Γ = Standard modl prdicts vry small - bar mixing: x & y 1 - R mix x y N N ( ( ΔΓ y = Γ y is xpctd to b small (. Hitlin, R. Morrison ± ± m m,, ± m m ± Nw physics not containd in SM such as and BESIII Mont Carlo Simulation M BC can nhanc th mixing. 36

37 Mixing at BESIII Mont Carlo simulation BES-III Snsitivity with fb 1 Mod Right sign vnts R mixing ψ(377( - ( ψ(377( - v ( - v ~3 ψ(377 ( - v ( μ - v μ ~9 ψ(377 ( - μ - v μ ( μ - v μ ~ 65 For th othr mods, th numbrs of right sign vnts ar stimatd with -bar cross sction, branching fractions and dtction fficincis tail Mont Carlo study of mixing with tagging th smilptonic dcay mods ar still in progrss! Mont Carlo study of masuring th mixing with charm data collctd at 4.14 (or 4.17 GV will bgin soon. 37

38 CP Violation at BESIII CP violating asymmtris can b masurd by sarching for vnts with two CP odd or two CP vn final stats, such as CP CP(- ignstat Tags CP,,, ρ CP Κs, Κsρ, Κsφ, Κsω... CP - Ψ(377 for th dcay of ψ(377 CP( f1 f = CP( f1 CP( f ( 1 CP[ ψ (377 ( ] = ar in a p f L 1 f = wav from 4 fb -1 Ψ(377 data, w can slct about 1x1 5 CP tags and about 1x1 5 CP- tags. With th larg CP taggd sampls w can prob th dirct CP violation, If w obsrvd two CP odd or two CP vn final stats simultanously w nd to analyz many channls to lucidat th sourcs of CP violation! 38

39 MC simulation for CP violation at BESIII fb -1 vs 44 vnts vs vs 34 vnts vs vs 66 vnts M BC vs Rmov th vnts of vs, vs and vs away from th MC sampl to study th ability of background rjction with th BES-III dtctor by looking for ths mods from th MC sampls Exprimnt snsitivity M A CP <.5x1 9% C.L. for 4 fb -1 BC 39 A CP < 9% C.L. for fb -1

40 Th strong phas Using th CP tag sampls (CP vs doubl tags & CPvs, w can masur th strong phas diffrnc δ btwn th dirct and CS amplituds, which appars in th tim dpndnt mixing masurmnts. Flavor mod CP - Ψ(377 δ at BESIII W can masur δ at ψ(377 1 cp ± >= [ > ± > ] CP Eignstat CP ϕ cosδ = Br( Δ(cosδ cp A( A( A( cp ± = 1 ± 1 N R 1 R Br( [ R cp ± = A( ± A( Br( cp = (3.7 ± A( A( W hav to nglct CP violation in mixing ] CF dcay = 1 ± Δ(cos δ ±.19 4 CS dcay R iδ 4 fb -1 N~18 CP vs N~18 CP- vs tags 4 fb -1 Δ(cos δ ±.8 fb -1

41 Rar dcays of msons at BESIII In th SM (Standard Modl, th short distanc charm FCNC (flavor changing nutral currnts ar much highly supprssd by th GIM mchanism than down typ quarks du to th larg mass diffrnc btwn up typ quarks. Th dilpton dcay procds by pnguim annihilation or box diagram. SM B( B( Nw Physics (Byond th Standard Modl may nhanc ths dcay procsss. For xampl, R-parity violating SUSY:givs B B B 3 ~ 1 μ μ ~ 3 1 ( ( μ μ ( ± μ m up to 1-1 up to 1-6 up to 1-6 (Burdman t al., Phys. Rv. 66, 149. Th dcay is strictly forbiddn in th SM. ± μ m 13 Obsrvation of FCNC and lpton numbr violating dcays could indicat nw physics. Bst limits ar from BABAR Sarch for ths kinds of rar dcays can prob Nw Physics 41

42 MC simulation for rar dcays at BESIII φ φ μ μ * μ * μ M BC MC Sampl for.5 fb -1 M BC cays M BC cays M BC S cays MC Sampl for 4 fb -1 4 Full MC simulation for rar dcays of (s msons

43 MC simulation for rar dcays at BESIII S cay BES-III(1-6 ± m S μ μ S m ± S μ S μ μ S μ μ S μ μ S μ μ S μ S S S S cay cay With 4 fb -1 of Ψ(43 data, th snsitivity can go down to about 1-5 ~ 1-6. Snsitivity can go down to with 4 fb -1 of ψ(377 data,.

44 Ratio of chargd/nutral production σ Why ar w intrstd in? BES-II rsult BES-II rsult E cm hadron hadron f f f f p p = σ ( = σ ( E cm Fraction of and yilds σ f = GV σ( 44 Th ratio would vary with changing th c.m. nrgy. 3 p p = = F.69 =.787 ±.74 ±.5 = 3.773GV σ( = σ( 3 pur phas spac F accounts for BES =.715±.6± Δ CLEO-c (.14 =.776±.4.6 sys

45 Ratio of chargd/nutral production Fraction of chargd and nutral yilds Thortical prdiction My calculations basd on th two obsrvd cross sctions only! It is not official!! f σ ( = σ ( fraction f σ ( = σ ( hp-ph/4171 M. B. Voloshin GV W can masur th fraction f vs E CM. A finr cross sction scan ovr th ψ(377 rsonanc with th BES-III at th BEPC-II will giv rsults on ths masurmnts 45 E cm

46 Masurmnts of ψ(377 Paramtrs Th inclusiv hadron & -bar production lin shaps along with th continuum hadron production shap with vacuum polarization corrctions BES-III Physics Book 46

47 BF[ψ(377 non-] BES-II rsult BES-III Physics Book hadron σ σ ~7 pb -1 data in ψ(377 rgion E cm GV E cm GV tot Γ ψ ( ±.5 MV 6.9 MV B[ ψ (377 ] Γ ψ ( ± 9 V 51 V Masurd valu Input valu (88. ±.4 ± ~. % Masurd valu Input valu 89 % With ~7 pb -1 of data collctd from 3.65 to GV with th BES-III tctor at BEPC-II, w can masurd th non-bar branching fraction of 47 ψ (377 dcays at an absolut prcision lvl of ~3% (from cross sction scans.

48 Linshap analysis for light hadrons Masurmnts of branching fractions for ψ(377 light hadrons with th BES-II at BEPC p p σ ILLUSTRATION ONLY!!! Assuming that w will masur th cross sction lin-shap for - light hadrons lik this at BES-III, thn w can masur its branching fraction by fitting th cross sctions. E cm [GV ] BES-III MC Th way to masur th branching fractions for ψ(377 light hadrons is to analyz th nrgy dpndnt cross sctions, sinc thr ar intrfrncs btwn th amplituds of th xclusiv final stats from rsonanc and from th continuum. But nding larg cross sction scan data sampls! W bliv that this would b th bst mthod to carfully study th charmlss dcays of ψ(377 with th BES-III at th BEPC-II, sinc it can sparat th contributions from both th QE and th rsonanc dcays, 48 and it can xtract out th phas diffrncs btwn th amplituds.

49 Sarch for Nw 1 -- stats Sarch for hybrid charmonium, molcular or othr xotic stats BES-III will collct data at GV, 4.3 GV or 4.14 ( or 4.17 GV, and prform finr cross sction scans covring th rsonancs. Finr rsonanc lin-shap analysis provids an opportunity to sarch for havy hybrid, -bar molcular, and four-quark stats. Analysis of th fin cross sction scan data may prob nw structurs associatd with hybrid charmonium, -bar molcular or othr xotic stats in this nrgy rgion Fin cross sctions scan If BEPC-II maximum nrgy can xtnd mor than 4. GV, that will b nic. 49

50 ,, S ωη c,... J / ψ, J / ψη, J ϕ, ϕ... Sarch for Nw 1 -- stats Masurmnts of th lin-shaps of th cross sctions for th xclusiv procsss: / ψη χ cj ( J =,1, ρ, χ cj ( J =,1, ω S '..., J / ψ X and comparing ths lin-shaps with th on for th inclusiv hadron production, on may find somthing nw. BES-II mad finr cross sction scan from 3.65 to 3.88 GV, and studid th lin-shaps of th inclusiv hadron production, production and som xclusiv charmlss final stats production. But data sampl is too small. At BES-III, w ar going to mak th finr cross sction scans covring th rsonancs with larg sampls to carfully study th structurs. Analyzing th finr cross sction lin-shaps would giv us som usful 5 information about whthr nw rsonancs xist in th nrgy rgion.,... W will try to masur all possibl accss componnts

51 Summary for BESII Masurd f significantly for th first tim Masurd CM matrix lmnts and form factors Γ( ν Masurd = 1.±.5±.4 Γ( ν, which supports that isospin consrvation holds in th xclusiv smilptonic dcays, solving th Long-standing puzzl Obsrvd th first non-bar dcay mod of ψ(377 J/ψ - for th first tim Masurd branching fraction for ψ(377 non- for th first tim Prcisly masurd R uds, paramtrs of ψ(377 and ψ(3686 tc 51

52 Summary for BESIII Prcision tst SM (with 4 fb -1 data Pur lptonic dcays f ~.%; f s ~ 1.3% Smilptonic dcays V cs ~ 1.6%; V cd ~1.8% Absolut Hadronic Branching fractions B( - ~.5% B( - ~.5% Somthing mor Sarch for Nw Physics (with 4 fb -1 data Mixing Snsitivity : 7.5x1-4 CP Violation Snsitivity : A CP <.5x1 9% C.L. Rar cays Snsitivity : 1-7 for 9% C.L. Snsitivity : 1-5 ~1-6 for s 9% C.L. Othr topics Uncovr th puzzl of ψ(377 production & dcays Sarch for nw particls in th rang from 3.7 to 4.8 GV somthing mor 5

53 Thank You! 53

54 Exclusiv Smilptonic cays-mc simulation BOSS6.1. BOSS6.1. ~5pb -1 N tag 3541±451 Mod - v - v ε 48% 49% M ν BC M ν BC N sig B(% Lum 3631±6 3.17±.6 ΔB/B[stat.] 47±.35±. ΔB/B[stat.] ν.5fb -1 ~1.9[.5]% ~5.[6.]% 4 fb -1 ~.7[.9]% ~1.8[.1]% fb -1 ~.3[.4]% ~.8[1.]% U U miss miss = E = E miss miss P P miss μ ν μ ν *, * * ρ,, ρ,,, miss U U miss miss = E = E miss miss P P miss miss Mod - μ v - μ v ε 1% 31% N sig 1588±4 7±16 B(% 3.16±.8.35±. 54 Prcision Masurmts

55 Exclusiv Smilptonic cays-vpsl dcay rats * (89 ν Focus FPCP 6 BES-II * ν S-wav intrfr asymmtry * ν cosv ((1 cos θlsin θv H ( q BW ((1cos θlsin θv H( q BW 1 A dχ = q ( sinθl cos θv H( q BW 8 8sin cos ( ( O( A iδ ( θl θv H q ho q R { A BW} H (q, H (q, H - (q ar hlicity-basis form factors which ar computabl by LQC A nw factor h (q is ndd to dscrib s-wav intrfrnc pic. Mor MC simulations ar ndd 4 fb -1 about 8 * ν doubly taggd vnts Evnts BES-III MC simulation Umiss(GV 55

56 - tag - mixing - Sarch for -bar Mixing - - CS Can not masur th tim volution of mson dcays, CS dcay can not b sparatd from th final stats. Th lvl of th CS background is highr than th lvl of th mixing. Cohrnc simplifis study no CS ψ - tag - mixing ψ (377 - ( 377 rquiring L to b vn, ψ ( 377 L = R 1 So CS can not happn mix x y ar cohrnt N N ( ( ± ± CS m m 56 - CS,, ± m m ±

57 Othr topics-cabibbo-supprssd cays Cabibbo-supprssd dcays ar valuabl for th undrstanding of th final stat intractions, som hadronic dcays provid a tst of th intrfrnc in charm dcays Many xprimnts, such as MARII, MARIII, E691, E689, E791, FOCUS, CLEO, BESII, BABAR, BELLE, CLEOc hav rportd thir masurmnts of branching fractions for th Cabibbo-supprssd hadronic dcays. Rlativ Branching Fraction Ratio = B B sup rf = Rfrnc Mods: -, - -, -,,tc. Mor MC simulations ar ndd Now, only fw mods hav <1.5% statistical rror, and most hav (3~16% statistical rror. W will b abl to systmatically study ths Cabibbo-supprssd dcays with gratly improvd prcisions 57 (.4-6% at BESIII with 4 fb -1 data takn at GV N N sup rf ε ε rf sup

58 Othr topics-alitz Plot Analysis Accss to study th intrfrnc btwn intrmdiat stat rsonancs and th final stat intractions Opportunity to masur both th amplituds and phass of th intrmdiat dcay channls, which in turn to dduc thir rlativ branching fraction It also probs for Nw Physics Byond Stand Modl cays s - Exprimnts MARII,MARIII,E691, E687,ARGUS,CLEO - MARIII, E687, E691, CLEO s BABAR BABAR BABAR CLEO BABAR MARIII,E687,E691, E791,BABAR MARIII E687,E791,FOCUS, CLEOc η - E687,FOCUS CLEO CLEO FOCUS 58

59 Othr topics-inclusiv hadronic masurmnts Srv to chck th sum of th masurd branching fractions on PG for th xclusiv dcays Provid som information about th rlativ strngth of th Cabibbosupprssd and Cabibbo-favord inclusiv dcays, which will purs thortical calculation to undrstand thm Thy ar limitd by th data sampl in history, which can b systmatically study at BESIII * X From BESII tag Signal rgion cays, X, - X, X, * -bx, * X, *- X, * X, φx, ηx, η X Exprimnts MARI,MARII,MARIII,BESII MARI,MARII,MARIII,HYBR, ACCM,BESII MARI,MARII,MARIII,HYBR, BESII BESII BESII BESII BESII BES,CLEOc CLEOc CLEOc tag sidband, ωx - Mass( BESIII provid nic opportunity to mor prcisly masur th branching fractions of ths inclusiv dcays. Th statistical rror in most masurmnts will rach <1% lvl 59