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Pawe ł Moskal

Few -body aspects of near threshold meson production. Pawe ł Moskal. Jagiellonian University , Cracow , Poland. EFB22 The 22nd European Conference on Few -Body Problems in Physics , Cracow , P oland , 9-13 September 201 3. Few -body aspects

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Pawe ł Moskal

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  1. Few-body aspects of nearthresholdmesonproduction Paweł Moskal JagiellonianUniversity, Cracow, Poland EFB22 The 22nd European Conference on Few-Body Problemsin Physics, Cracow, Poland, 9-13 September 2013

  2. Few-body aspects of nearthresholdmesonproduction Paweł Moskal JagiellonianUniversity, Cracow, Poland EFB22 The 22nd European Conference on Few-Body Problemsin Physics, Cracow, Poland, 9-13 September 2013

  3. NNMNNNM NNNNM p π η φ R. Pohl and others, The size of the proton, Nature 466, 213 (2010) Transition Form-Factors: J. ZdebikPhD JU (2013); M.HodanaPhD JU (2012) I thought… the scientifictheorieswere not the digest of observation, but thattheywereinventions-conjecturesboldlyputforward for trial to be eliminatediftheyclashed with observation … David Hume

  4. production of mesonsatthreshold • experimentalaspects • productiondynamics • hadronicinteraction • mesic-nuclei? • Borromean-states? • Homework

  5. EXPERIMENTAL FACILITIES • IUCF • SATURNE • CELSIUS • COSY • MAMI • ELSA • J-PARC • JINR

  6. threshold as a spinfilter 3P01S0s in the laboratory P 3 GeV/c h P beforereaction: afterreaction: in the centre of mass system P h 1 GeV/c P 1 GeV/c L = 1, S = 1 L = 0, l=0 Reaction parameter b 0.2 fm

  7. experimentaladvantages

  8. experimentalchallange !

  9. OBSERVABLES σ = dVps |M|2 σ (Q) Close-to-thresholdexcitationfunction: dσ , dσ , ... Differential distributions: dΩ dmpp Isospin dependence NN →NNM Spin observables: AY |M|2 ~ |M0|2 |MFSI|2 interaction dynamics →|M0|2 interaction→σ (Q) structure dynamics

  10. production of mesonsatthreshold • experimentalaspects • productiondynamics • hadronicinteraction • mesic-nuclei? • Borromean-states? • Homework

  11. production dynamics e.g.mesonη dynamics →|M0|2 What would the first experimental physicists tell us? Salviati. But if, of many computations, not even twocame out in agreement, what would you think of that? Simplicio. If that is how the matters stand, it is truly a serious defect GALILEO GALILEI ”Dialogue concerning the two chief world systems” Whatwould the best student of the Jagellonian University tell us? He is encouraging us to continue: For what is determinate cannot have innumerable explanations NICOLAUS COPERNICUS ”Minor Works III, Letter against Wagner” ONE NUMBER and MANY GRAPHS

  12. dynamics →|M0|2 LARGE → RESONANSE CELSIUS COSY SATURNE

  13. X X X • STRONG ISOSPIN DEPENDENCE • Eta meson is by factor of 12 • more coupiously produced • when the total isospin of nucleons • is equal to 0 • than when it is equal to 1 • Strong evidence of isovectormeson • exchange inproduction mechanism CELSIUS COSYSATURNE

  14. This was PREDICTED already about 2500 years ago by the very first physicists Thus, it is suggested that among created beings there must be some basic agent which will move things and bring them together ARISTOTLE “Metaphysics” X X X X r p COSY-11: R. Czyżykiewicz et al., Phys. Rev. Lett. 98 (2007) 122003

  15. production of mesonsatthreshold • experimentalaspects • productiondynamics • hadronicinteraction • mesic-nuclei? • Borromean-states? • Homework

  16. σ = dVps |M|2 |M|2 ~ |M0|2 |MFSI|2 |MFSI|2 ~ |Mpp|2 |Mp1η|2 |Mp2η|2 dynamics →|M0|2 interaction→σ (Q) CELSIUS COSY SATURNE

  17. SIMULATION SIMULATION EXPERIMENT Q = 15.5 MeV Phys. Rev. C 69 (2004) 025203 EXPERIMENT Q = 15.5 MeV EXPERIMENT Q = 4.5 MeV EXPERIMENT Q = 10 MeV

  18. COSY TOF, COSY-11, WASA/CELSIUS

  19. σ = dVps |M|2 |M|2 ~ |M0|2 |MFSI|2 |MFSI|2 ~ |Mpp|2 |Mp1η|2 |Mp2η|2 dynamics →|M0|2 interaction→ σ (Q) CELSIUS COSY SATURNE

  20. COSY-11 STILL ALIVE PRELIMINARY Rysunek 3. Widmo masy niezmienniczej podukładu proton-proton dla układu ppη (zielone punkty) oraz ppη’ (czerwone punkty) wyznaczone dla energii wzbudzenia wynoszącej 15.5 MeV. W celu umożliwienia porównania kształtu widm dane dla mezonu η’ zostały unormowane do danych otrzymanych dla mezonu η.

  21. WASA-at-COSY p pp pM109and1011π0on discsp pp p106mesons on discs →

  22. production of mesonsatthreshold • experimentalaspects • productiondynamics • hadronicinteraction • mesic-nuclei? • Borromean-states? • Homework

  23. 3Heinteraction (pd3He) η   + +

  24. η T. Mersmann et al., Phys. Rev. Lett. 98, 242301 (2007)  - 3He • dp3Heγ 3He3He COSY MAMI + + ANKE:T. Mersmann et al.,Phys. Rev. Lett. 98 242301 (2007) COSY-11: J. Smyrski et al., Phys. Lett B 649 258-262 (2007)

  25. η η  - He • dp3He C.Wilkin et al., Phys. Lett. B654 (2007) 92‏ |Re(a)| > Im(a) + + σtot = pcm/pcmbeam |fB/(1-ipcma)|2 |Re(a)| = 2.9 ± 0.6 fm + + Im(a) = 3.2 ± 0.4 fm ANKE:T. Mersmann et al.,Phys. Rev. Lett. 98 242301 (2007) COSY-11: J. Smyrski et al., Phys. Lett B 649 258-262 (2007)

  26. production of mesonsatthreshold • experimentalaspects • productiondynamics • hadronicinteraction • mesic-nuclei? • Borromean-states? • Homework

  27. THEETA-MESIC NUCLEUS η mesonbound with nucleus via STRONG INTERACTION η + + π N* N* N* + COSY, J-PARC, MAMI, GSI, LPI/JINR Talk by Wojciech Krzemieńatthisconference … G. A, Sokol et al., arXiv:nucl-ex/0106005

  28. d+d→(4He-η)bound→3He + p + π- d+d→3He + p + π- SIMULATIONS

  29. ETA MESIC NUCLEUS, COSY d+d→3He + p + π- d+d→(4He-η)bound→3He + p + π- d+d→(4He-η)bound→3He + p + π- d+d→(4He-η)bound→3He + n + π0 40 timeslargerstatistics

  30. production of mesonsatthreshold • experimentalaspects • productiondynamics • hadronicinteraction • mesic-nuclei? • Borromean-states? • Homework

  31. Isola Bella BaroqueBorromeoPalace, Lake Magiorre in Italy Borromeo, Sforza, Visconti The most famous of the islands, Isola Bella, is crowned by the princely Borromeo Palace with its formal Italian-style gardens laid out on ten terraces.  The Baroque palace contains a wealth of artefacts: original furnishings, gold and silk Flemish tapestries, period weapons, sculptures, paintings and frescoes from the 16th to the 19th centuries. 

  32. Borromeanrings from nucleons 6He + +

  33. σ = dVps |M|2 η |M|2 ~ |M0|2 |MFSI|2 |MFSI|2 ~ |Mpp|2 |Mp1η|2 |Mp2η|2 dynamics →|M0|2 interaction→ σ (Q) CELSIUS, COSY, SATURNE + + S. Wycech Acta Phys. Polon. B 27(1996) 2981

  34. A. Deloff, AIP Conf. Proc. 950 (2207) 150 η „At present it is not possible to draw a solid quantitative conclusion about the sizeof the system since e.g. in the case of the pp → pp reaction it would require to solve a three-body problem where pp and p-eta interactions are not negligible and bothcontribute significantly to the proton-proton correlation. However, based on semiquantitativepredictions one can estimate that the system must be unexpectedlylarge with a radius in the order of 4 fm” + COSY-11: P. Klaja et al., J.Phys. G37 (2010) 055003 + Correlationfemtoscopy Koonin-Pratt model [2]

  35. production of mesonsatthreshold • experimentalaspects • productiondynamics • hadronicinteraction • mesic-nuclei? • Borromean-states? • Homework

  36. HOMEWORK for the next EFB23 • Using many-bodyformalismtry to determine: • Total cross section for the pp→ppη (pp→ppM) • Total cross section for the production of mesicnucleus • Distribution of N* momentum in the (3He-N*) helium • Correlationfunction for the ppηsystem HINT: It isverysimple to do!

  37. THANK YOU FOR YOUR ATTENTION

  38. production of mesonsatthreshold • experimentalaspects • productiondynamics • hadronicinteraction • mesic-nuclei? • Borromean-states? • ABC resonance • Homework

  39. 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

  40. Attractive interaction between η and N (R. Bhalerao and L. C. Liu, Phys. Lett. B54 (1985) 685 )‏ possible existence of bound states of the η meson with nuclei for A>10 (Q. Haider and L. C. Liu, Phys. Lett. B172 (1986) 257 )‏ • Optical potential η nucleus calculated in the frame of unitarized chiral perturbative approach • (C.Garcia-Recio, T. Inoue, J.Nieves, E. Oset,Phys.Lett.B550 (2002)47).

  41. η-25Mg Search for the η-mesic nuclei in a recoil-free transfer reactionCOSY-GEM Collaboration p + 27Al → 3He + π- + p + X A. Budzanowski et al., Phys. Rev. C 79 (2009)

  42. η bound state possible with the light nuclei 3He-η3H-η4He-η(C. Wilkin, Phys. Rev., C47 (1993)) Supported by model calculations of: - S. Wycech et al., Phys. Rev. C52(1995)544 (the multiple scattering theory) - N. N. Scoccola and D. O. Riska, Phys. Lett. B444(1998)21 (the Skyrme model) and by observations of: - near threshold enhancements of the amplitudes for the dd 4Heη and pd 3Heη reactions (N. Willis et al.., Phys. Lett. B406(1997)14) Q. Haider, L.C. Liu, Acta Phys. Pol. B Supp. 2 (2009) 121

  43. produkcja mezonu  : production: mocne oddziaływanie  - N jądra mezonowe ?

  44. Dynamics of the ppppη reaction

  45. Higher Partial Waves * ηN FSI effects? * P-wave contribution? K. Nakayama et al., Phys. Rev. C 68 (2003) 045201

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