SUMMARY (EXPERIMENT)

SUMMARY (EXPERIMENT) Stefano Bianco Laboratori Nazionali di Frascati dell’INFN • INLOOK • SYNOPSIS • OUTLOOK S.Bianco - HADRON 2011 - Summary (Experiment)

INLOOK SWANSON HADRON09 S.Bianco - HADRON 2011 - Summary (Experiment)

SYNOPSIS • 37 plenary talks • 128 parallel talks • 36 poster presentations S.Bianco - HADRON 2011 - Summary (Experiment)

THE LIGHTEST (?) LASSERRE S.Bianco - HADRON 2011 - Summary (Experiment)

VERY LIGHT - The Shrinking Proton POHL • CREMA Collaboration • A new determination of the proton radius via the Lamb shift in muonic hydrogen • Proton is 4% smaller, and Rydberg constant is 5sigma off. S.Bianco - HADRON 2011 - Summary (Experiment)

VERY LIGHT - The Shrinking Proton S.Bianco - HADRON 2011 - Summary (Experiment)

LIGHT MESONS & BARYONS NEUBERT, BECK, TAKAHASHI, TAMURA, HICKS, SALABURA • Pion diffraction • Hypernuclei • Suppression of jets @ LHC • Resonances • Quest for 5-quark S.Bianco - HADRON 2011 - Summary (Experiment)

LIGHT MESONS & BARYONS NEUBERT S.Bianco - HADRON 2011 - Summary (Experiment)

Electromagnetic excitation off the neutron BECK Crystal Barrel at ELSA result quasifree h photoprodruction: Narrow structure in nh - final state Publication: I. Jaegle, B. Krusche, … accepted by EPJA S.Bianco - HADRON 2011 - Summary (Experiment)

Status on Meson Photoproduction BECK Crystal Barrel at ELSA Nearly complete data base CLAS at JLAB Complete data base Crystal Ball at MAMI Only a few experiments S.Bianco - HADRON 2011 - Summary (Experiment)

p(π-,K-)X Missing Mass TAKAHASHI Preliminary • Expected resolution 1.5MeV/c2 • No peak structure was observed. • Present upper limit ~ 0.3mb/sr (averaged 2―15°) • ~0.3mb(isotopic K distribution) S.Bianco - HADRON 2011 - Summary (Experiment)

HICKS S.Bianco - HADRON 2011 - Summary (Experiment)

Nu ~ Nd ~ Ns Strangeness in neutron stars ( r > 3 - 4 r0 ) Strange hadronic matter (A → ∞) Strangeness LL, X Hypernuclei Z L, S Hypernuclei -2 N -1 0 World of matter made of u, d, s quarks TAMURA “Stable” Higher density ３-dimensional nuclear chart by M. Kaneta inspired by HYP06 conference poster S.Bianco - HADRON 2011 - Summary (Experiment)

Overview of Strangeness Nuclear Physics Experiments TAMURA • K- or p+/- beams KEK-PS, BNL-AGS => J-PARC L and S hypernuclear spectroscopy, g-spectroscopy of L hypernuclei LL and X hypernuclei [Takahashi], weak decays of L hypernuclei K- nuclei [Fujioka], K- atoms, • e- beam Jefferson Lab (Hall A, Hall C), MAMI-C high-res. Lhypernuclear spectroscopy, weak decays • K- from f DAFNE (FINUDA, SIDDHARTA, AMADEUS) spectroscopy of L hypernuclei [Botta,Bonomi] weak decays of L hypernuclei [Bufalino] K- nuclei, K- atoms [Ishiwatari,Okada], • Heavy ion beams GSI (HypHI) Heavy-Ion induced production, lifetimes,.… S.Bianco - HADRON 2011 - Summary (Experiment)

Neutron-rich hypernuclei Akaishi et al., PRL 84 (2000) 3539 p- p p -> L n K+ TAMURA 2-step charge exchange (p-p->p0n, p0p->K+L etc.) Via S- admixture in L hyp. (p- p->S- K+, S- p<->Ln) pp~1.2 GeV/c 11.1±1.9 nb/sr 10B (p-, K+) 10LLi Physics Interest • L-S coherent coupling -> LNN attraction important in neutron stars • Cross section sensitive to S- admixture in L hyp. • n-halo disappear by L ? Almost no background KEK E521, K6+SKS Saha et al., PRL 94 (2005) 052502 First data on n-rich hypernucleus New data from FINUDA – 6LH suggested by 6Li(K-stop,p+) E. Botta, Monday S.Bianco - HADRON 2011 - Summary (Experiment)

E.Botta - Parallel 249÷255 MeV/c (sp=1.1 MeV/c) 6H 3 candidate events 2.7 107 K-stop events p+ momentum (MeV/c) 130÷138 MeV/c (sp=1.2 MeV/c) Preliminary p- momentum (MeV/c) p- momentum (MeV/c) XIV International Conference on Hadron Spectroscopy S.Bianco - HADRON 2011 - Summary (Experiment)

Motivation TALABURA R. Rapp, J. Wambach, Adv. Nucl. Phys. 25 (2000) P. Muehlich et al. NPA 780(2006)  meson „cold matter” • meson • at rest p = 0.3 GeV/c „hot and dense matter” • Many predictions for sizable modifications of meson spectral function A(m, p) in cold and hot nuclear matter: broadening and „dropping mass” scenarios • A(m,p) QCD vacuum properties via QCD sum rules (B. Kaempfer talk) • Experiments: +A, p+A,A+A  mesons: ,, , , ’ • cold matter, Spring8, CLAS @ JLAB, CBELSA/TAPS, : KEK E325 , ANKE, HADES • HI collisions: DLS, HADES, Helios, CERES, Na60, STAR, PHENIX, LHC.. S.Bianco - HADRON 2011 - Summary (Experiment)

Summary TALABURA Meson transparency in cold nuclear matter shows increased meson (, ,, ’ ) widths in-medium >> free Estimates of meson absorption cross sections in nucleus indicate NVin-medium > NVfree : significant role of n (>2)- particle interactions ? determination of  -meson shape in cold nuclear matter requires better understanding of /N* -Ne+e- transitions and role of secondary processes-important for HI collisions !  absorption observed in HI collisions (low pt ) , no effects found for  e+e- excess in A+A collisions is related to recreation of short lived resonances : „resonance” clock” :  at SPS and baryonic resonances, ( ) at SIS18 melting of the  meson in hot and dense matter (SPS) is dominated by baryonic effects in agreement with „hadronic” scenario S.Bianco - HADRON 2011 - Summary (Experiment)

STRUCTURES, FORM FACTORS, … PRETZ, ASCHENAUER, SELYUZHENKOV S.Bianco - HADRON 2011 - Summary (Experiment)

PRETZ S.Bianco - HADRON 2011 - Summary (Experiment)

Transverse single-spin asymmetries left right ASCHENAUER FNAL s=19.4 GeV BRAHMS@RHIC s=62.4 GeV BNL AGS s=6.6 GeV ANL ZGS s=4.9 GeV p0 Big single spin asymmetries in pp !! Naive pQCD (in a collinear picture) predicts AN ~ asmq/sqrt(s) ~ 0 What is the underlying process? Sivers or Twist-3 or Collins or .. Do they survive at high √s? Hadron, June 2011 - Munich 27 E.C. Aschenauer S.Bianco - HADRON 2011 - Summary (Experiment)

What is seen at RHIC ASCHENAUER • No strong dependence on s from 19.4 to 200 GeV • Spread probably due to different acceptance in pseudorapidity and/or pT • xF ~ <z>Pjet/PL ~ x : shape induced by shape of Collins/Sivers • Sign also consistent with Sivers and/or Transversity x Collins need other observables to disentangle underlying processes Do we understand the theory Hadron, June 2011 - Munich 28 E.C. Aschenauer S.Bianco - HADRON 2011 - Summary (Experiment)

SELYUZHENKOV S.Bianco - HADRON 2011 - Summary (Experiment)

CHARM GAO, LI, KHUR S.Bianco - HADRON 2011 - Summary (Experiment)

CHARM K.Seth parallel S.Bianco - HADRON 2011 - Summary (Experiment)

CHARM LI S.Bianco - HADRON 2011 - Summary (Experiment)

LI S.Bianco - HADRON 2011 - Summary (Experiment)

CHARM @ LHC GAO S.Bianco - HADRON 2011 - Summary (Experiment)

GAO S.Bianco - HADRON 2011 - Summary (Experiment)

KUHR S.Bianco - HADRON 2011 - Summary (Experiment)

BEAUTY PATRIGNANI, LEONARDO, EVANS, KHUR S.Bianco - HADRON 2011 - Summary (Experiment)

KUHR S.Bianco - HADRON 2011 - Summary (Experiment)

BEAUTY PATRIGNANI S.Bianco - HADRON 2011 - Summary (Experiment)

BEAUTY LEONARDO S.Bianco - HADRON 2011 - Summary (Experiment)

LEONARDO S.Bianco - HADRON 2011 - Summary (Experiment)

SUMMARY (EXPERIMENT)