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Pawe ł Moskal

Studies of the eta meson decays with the WASA detector at COSY. Pawe ł Moskal. Jagiellonian University, Cracow, Poland on behalf and for the WASA-at-COSY Collaboration. MESON2012

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Pawe ł Moskal

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  1. Studies of the eta meson decays with the WASA detector at COSY Paweł Moskal Jagiellonian University, Cracow, Poland on behalf and for the WASA-at-COSY Collaboration MESON2012 12th International Workshop on Meson Production, Properties and Interaction, Cracow, Poland, 31 May - 5 June 2012

  2. WASA-at-COSY searchesfor the phenomenabeyond the applicability of Standard Model of ParticlePhysics Sincenothingismorepleasurablethan to falsify the theory !! I thought… the scientifictheorieswere not the digest of observation, but thattheywereinventions-conjecturesboldlyputforward for trial to be eliminatediftheyclashed with observation … David Hume

  3. productionand decay of the meson • Decays: • test of discretesymmetries • search for darkmatterboson • contributing to the studyof aμ • test of QCD anomalies • test of CHPT … • Production: • test of chargesymmetry • search for the eta-mesicnuclei • studies of ABC effect – newresonance? • hadronicinteractions …

  4. productionand decay of the meson • Decays: • test of discretesymmetries • search for darkmatterboson • contributing to the studyof aμ • test of QCD anomalies • test of CHPT … • Production: • test of chargesymmetry • search for the eta-mesicnuclei • studies of ABC effect – newresonance? • hadronicinteractions …

  5. decay: meson C P CP +1 -1 -1 Allstrong and electromagenticdecays areforbiddenin a firstorder In SM weakdecaysareexpected to occurat10-13 PRECISE TESTS OF DISCRETE SYMMETRIES

  6. C() = +1 , P() =-1;C(0) = +1 , P(0) =-1 - violatesP and CP violates G and ( I or C ) 0γ , 00γviolatesC Second order EM γγ isforbidden in a masslessquarkslimits γγγviolatesC etc… →γ(C)<1.6 x 105 at 90% CL(PLB 591, 49) →(P,CP)<1.3 x 105 at 90% CL(PLB 606, 276)

  7. WASA-at-COSY 109mesons on discs thispresentationisbased on ~ 3 · 107

  8. WASA

  9. COolerSYnchrotron COSY WASA-at-COSY pppppd3He • polarised and unpolarised proton • and deuteron beams • stochastic and electron cooling • momentum range: 600 – 3700 MeV/c • meson production up to (1020)

  10. WASA-at-COSY pppppd3He

  11. WASA-at-COSY pppppd3He

  12. WASA-at-COSY pppppd3He Today chargedmodes

  13. 00γviolatesC 00γviolatesC -γdoes not ifL(+-) = 1

  14. -γ L(-) = 1 Phys. Lett. B707 (2012) 243 -ChristophRedmer, PhDthesis

  15. -γ F. Stollenwerk, C. Hanhart, A. Kupść, U.G, Meissner, A. Wirzba, Phys. Lett. B707 (2012) 184 α = 1.89 ± 0.25± 0.59 Phys. Lett. B707 (2012) 243 ChristophRedmer, PhDthesis factor of 100 moremesons collected by WASA-at-COSY

  16. -γ*-e+e-  -γ* - γ suppresed by α -γ*-e+e-

  17. -e+e- flavourconserving CP violation 180ᵒ - φ e+ φ e- e+ π+ π+ e- π- π- CP conservationimpliesN(φ) = N(180 – φ)

  18. -e+e- IN PREPARATION ….

  19. -e+e- -γ

  20. -e+e- Daniel CoderrePhDthesis 2012 A= PL B675 (2009) 283 Theoreticalpredictionsup to 2% and with KLOE-2 0.8 % precision isexpected

  21. -e+e- factor of 30 moremesonscollected by WASA-at-COSY A= PL B675 (2009) 283 Theoreticalpredictionsup to 2% and with KLOE-2 0.8 % precision isexpected

  22. γγe+e- Suppressed by α2 and by (me/m)2 10-9 Sensitive to hypotheticalinteractions from beyond the Standard Model

  23. e+e- HADES Collaboration: < 5.6·10-6at CL=90%) Eur. J. Phys. A48 (2012) 64 Poster by Marcin Berłowski Background:pp→pp+-, →e+e-, pp→p∆(1232)→pp[*→e+e-] based on 4.4 107ηmesons BRlimit= 4.6×10−6at CL 90% (preliminary) MMpp for →e+e-eventcandidates factor of 20 moremesonscollected by WASA-at-COSY

  24. γγ* γe+e- Suppressed by α

  25. Selected examples of investigations planned by the KLOE-2  - interaction: γγ*  γe+e- Mesontransition Form Factors The anomalous muon magnetic momenta = (g - 2)/2 = (116592080 ± 60) 10-11 from E821 at BNL theory : a = aQED + aweak + ahad FNAL experiment plans to improve this accuaracyto0.14 ppm M. Hodana, PhD thesis, arXiv:1203.5756 hadroniclight-by-lightscattering Particle's charge radius: p π η KLOE-2 unique for providing data in space-like region below 1 GeV based on 107 eta mesons factor of 100 moremesonscollected by WASA-at-COSY

  26.  γγ* γe+e- γ*γ*e+e-e+e- Suppressed by α Suppressed by nextfactor of α 7 10-3 / 137 = 5 10-5

  27. Oraz może pokazace+e-e+e- wstepne na podstawie ….XXX* 10^7  γ*γ* e+e-e+e- KLOE KLOE: KLOE: Neeee = 52 ± 13 WASA-at-COSY analysis: L. Yurev, P. Wurm factor of 30 more eta mesons on discs factor of 30 moremesonscollected by WASA-at-COSY

  28. π+π-π0

  29. π+π-π0 s3 VI I s2 s1 V II III IV Poster by M. Zieliński factor of 30 moremesonscollected by WASA-at-COSY

  30. Oraz może pokazace+e-e+e- wstepne na podstawie ….XXX* 10^7 CP dark matter C …

  31. THANK YOU FOR YOUR ATTENTION

  32. ABC effect in doublepionicfusion- a newresonance? Cross section for pn→ dπ0π0 Phys. Rev. Lett. 106 (2011) 242302 Plenary talk by AnettePricking: Monaday, June 4th, 13:00-13:30 Posters by MikhailBashkanovand Tatiana Skorodko

  33. Search for THEETA-MESIC NUCLEUS ηmesonbound with nucleus via STRONG INTERACTION η + + π N* N* N* + Talk by Wojciech Krzemień, Session B 17:30, 31.05 Thursday Poster by Magdalena Skurzok G. A, Sokol et al., arXiv:nucl-ex/0106005

  34. Dalitzdecayω→π0e+e− Missing Mass ofpd → 3He X after π0e+e−selection Talk by 17:10-17:30 FarhaAnjumKhan, Friday, June 1-st, Session B2

  35. Oraz może pokazace+e-e+e- wstepne na podstawie ….XXX* 10^7

  36. THANK YOU FOR YOUR ATTENTION

  37. IN PREPARATION …. -e+e- Test of non-CKM CP Violation 10-12 -10-15 10-3 CP conservationimplies N(φ) = N(180 – φ) 13.6 ± 2.5 (stat) ± 1.2 (syst)% KTeV PRL 84 (2000) 408

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