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Nuclear Physics group

Nuclear Physics group. Coordinator: Pasquale Di Nezza. LNF Scientific Commitee, November 22 nd , 2007. AIACE. Total FTE Res.+Tech 40.2 Technicians 6.3. SIDDHARTA. Lab: JLab, Hadronic Physics FTE: res.+tech. 6.7. Lab: CERN, QGP Physics FTE: res.+tech. 6.9.

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Nuclear Physics group

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  1. Nuclear Physics group Coordinator: Pasquale Di Nezza LNF Scientific Commitee, November 22nd, 2007

  2. AIACE Total FTE Res.+Tech 40.2 Technicians 6.3 SIDDHARTA Lab: JLab, Hadronic Physics FTE: res.+tech. 6.7 Lab: CERN, QGP Physics FTE: res.+tech. 6.9 Lab: LNF, Nuclear Physics FTE: res.+tech. 6.2 GRAAL Lab: ESRF, Hadronic Physics FTE: res.+tech. 1.2 Lab: DESY, Hadronic Physics FTE: res.+tech. 5.0 Lab: GSI, Had/Nucl Physics FTE: res.+tech. 2.9 Lab: LNF, Nuclear Physics FTE: res.+tech. 8.0 Lab: LNGS Nuclear Physics FTE: res.+tech. 3.0 VIP

  3. 5 experiments (over 8) have the national spokesperson @LNF: • AIACE, HERMES, PANDA, SIDDHARTA and VIP • Several important national and international responsibilities: • ALICE (Management Board), AIACE (Scientific Committee), FINUDA (Spokesperson), HERMES (Deputy Spokesperson), PANDA (Deputy Spokesperson), SIDDHARTA (Spokesperson), VIP (Spokesperson), • I3HP (Chair), …… • 40.2 res+tech within LNF Nuclear Group: Researchers

  4. Time schedule data taking 2007 1997 2003 2005 2009 1995 2001 1999 AIACE ALICE FINUDA GRAAL HERMES PANDA SIDDHARTA VIP >2013 >2014

  5. LNF- INFN, Frascati and INFN, Trieste, Italy SMI, Vienna,Austria; IFIN–HH, Bucharest, Romania Univ. Neuchâtel, Switzerland Resp: Spokesperson Goal perform an experimental test of the validity of the Pauli Exclusion Principle for electrons to 10-30validity of Pauli principle in a >3 +1 dimensional space-time, strings, superstrings, … Validity limits before VIP: b2/2 < 1.7 .10-26 PLB 1990 The VIP Experiment (VIolation of the Pauli Exclusion Principle) Experimental method search for anomalous X-ray transitions in copper (2p->1s with 1s already occupied by 2 electrons; have the energy displaced with respect to the “normal” one) @ LNGS Laboratory (since February 2006)) to reduce the X-ray background induced by cosmic rays

  6. Energy spectra for the VIP measurements with the VIP setup in laboratory +shielding Best limit on PEP violation (factor 40 of improvement of the previous published result) Published Phys. Lett. B641 (2006) 18-22 The subtracted spectrum: current minus no-current

  7. Polarization observables measurements for γp  K+Λ and γp  K+Σ0 for energies up to 1.5 GeV EPJ A31 (2007) 79 Polarized photons (6.03 GeV) @ESRF for photonuclear reaction studies. GrAAL p0 on quasi free neutron

  8. AIACE submitted published/ accepted PRL PRC 30 27 27 20 15 10 PRD PLB 5 EJP 10 Other 4 2 1 5 2005 2006 2007 2000 2001 2002 2003 2004 year Physics goal Study of the hadron structure and of the strong interaction in terms of fundamental constituents AIACE EXPERIMENT LaboratoryTJNAF (Newport News, Va -USA) / Hall B - CLAS Collaboration Beam e-, : Emax = 6 GeV LNF resp:Chair Service Work Committee Italian Coll. LNF & INFN e Universita’ di Genova  FTE : 11.7 + 1.4 (tech) + 22 Technical Papers Start data taking: February 1998 Total publications as AIACE leading authors: 25/82 ~30% (9% members/tot)

  9. Counts/4 MeV M(nK+)(GeV) No pentaquark signals from CLAS high statistics measurements …Just completed: Pentaquark UPPER LIMIT(95%CL) 1.52 < M(+) < 1.56 GeV s (gp→ Q+)< 1 nb s(gp→Q+ )< nb M. Battaglieri, R. De Vita al et al. PRL 96, 042001 (2006) R. De Vita, M. Battaglieri et al. PRD 74, 032001 (2006) V. Kubarovsky, M. Battaglieri, R. De Vita et al. PRL 97, 102001 (2006) s(gd→LQ+)< nb s(gn→K-Q+)< 3nb B. McKinnon,K. Hicks, N.Baltzell, D. Carman, M. Mestayer, T. Mibe, M. Mirazita, S. Niccolai, P. Rossi, S. Stepanyan, D.J. Tedeschi et al.PRL 96 (2006), 212001 S. Niccolai, M. Mirazita, P. Rossi et al. PRL 97, 032001 (2006)

  10. Strangeness photoproduction: γn → K+Σ- Comprehensive study of e.m. strangeness production in Hall B on proton and neutron with polarized and unpolarized beam and targets • study the baryon resonances not otherwise revealed (non p dacay), • obtain info about couplings of nucleon resonances to KY final states • Eγ : from threshold to 3.59 GeV • θKlab: from 10 to 140 degrees γn → K+Σ- preliminary World data on neutron d/d:very few data in a very limited angular range TOT:no data arbitrary units cos θKCM

  11. Primary Beams Secondary Beams Storage and Cooler Rings Resp: Deputy Spokesperson : the new antiproton facility FacilityforAntiproton and IonResearch • perform high resolution spectroscopy with - p formation experiments: • ΔE ≈Δ Ebeam • produce, with high yields,gluonic excitations: glueballs, hybrids, multi-quark states • σ≈ 100 pb • study partial chiral symmetry restoration • by implanting mesons inside the nuclear medium • produce hyperon-antihyperontaggable beams

  12. PANDA Straw Tubes Tracker PANDA central tracking detector has to fill a cylindrical volume with an internal radius of 150 mm, external one of 420 mm, and a length of 1500 mm. Detector requirement are: • Almost full angular coverage; • High momentum resolution, δp/p~1%; • High spatial resolution, σrφ~150μm, σz~1-3mm; • Minimal detector material budget, X0~1%; • High rate capability, 107ev/s; • Resistance against aging effects, 1-2 C/cm/year;

  13. Activity @LNF Frascati, 05/06/07 – LNF/SPAS Panda ST_Tracker Detector Layout • Mechanical support • Electronic integration • Gas line paths and flow • Prototype construction • +cosmic rays test

  14. HERa MEasurement of Spin (DESY) 180 members coming from 30 Institutes (12 Countries) (INFN: Bari, LNF, Ferrara, Sanita’) HERA shutdown: 2/7/2007

  15. 30% of publications have an LNF first author (6% members/tot) • Deputy Spokesperson, 2 Editorial Board Members, Executive Board Member • Hardware: e.m. Calorimeter (resp.), RICH, Recoil (resp: g-det) • Nuclear and exclusive analysis group coordinators

  16. Top cited +300 Top cited +100 Top cited +300 Top cited +100 Top cited +50 HERMES view at the nucleon structure polarised DIS  HERMES: from unpolarised DIS first glimpse a0 =0.330±0.025(exp)  signals of GPDs  Ju+Jd transversity is non-zero! first T-odd DF in DIS direct flavour decomp. new constrain on Ds

  17. Space-time evolution of hadronization HERMES provides information on partonic propagation, energy loss and scattering, and constraints in pre-hadronic effects HERMES kinematics is relevant to ion-ion mid-rapidity Possibility to formulate consistent pictures of nuclear effects in cold and hot nuclear matter

  18. Motivations to built an e.m. calorimeter RHIC @ BNL (Au+Au 200GeV) * * Top Physics Story del 2005 per l’ American Physical Society • Photons are not suppressed • Only hadrons at high pT are suppressed according to the pQCD + propagation • Studies on the “surface” of the medium • The hot nuclear matter behaves as a liquid (residual interaction) not as a gas! • Higher pt • Higher energy  remove residual interaction • Full jet reconstruction • Full jet particle identification ? ALICE @ LHC Jet Quenching

  19. Al Pb Steel Scint. Fiber. EmCal Structure • -0.7<η<0.7 e 0 <Φ<2/3 opposite to PHOS • Support structure under installation • 11 SuperModules • 1 SM = 24x12 modules • 1 module = 4 channels • 1.2x104 total channels (granularity)

  20. EmCal production @LNF

  21. Fiber cutting and sputtering at Frascati • WLS readout : continuous operation of 1 cutting-polishing-gluing and 1 sputtering station for WLS fibre bundles needed for 3 SM (124000 fibres, 3500 bundles) • Optical and mechanical coupling of bundle with APD for 3456 channels (3 SM)

  22. EMCal test beam sept/oct 2007 @cern SPS/PS Energy reconstruction, linearity, uniformity 80 GeV e- @fixed position Ereconstructed [GeV] !caveats preliminary calibration, beam momentum spread not unfolded

  23. Management Board Project Leader: T. Cormier10) Deputy: N. Bianchi6), C. Roy3) T. Awes9), P. Di Nezza6), P. Jacobs7), S. Kox2), R. Soltz8) Technical Coordinator: J. Rasson7) Mec. Engineering Integration M. Dialinas3) Alice-CERN Representative Y. Schutz1) Technical Coordinator J. Rasson7) Electronics T.Awes9) Trigger P.Jacobs7) On-line DAQ D.Silvermyr9) Intallation L.Lesitam1) Off-line G. Conesa6) J.Klay8) Detector and strip Module P. Di Nezza6) V.Petrov10) FEE Calibrate/Test K.Read18) J.Schambach19) Infostructure and tools Pulvirenti5) A.Pavlinov10) Support Structure J.Berkowitz7) Scintill. A.Pavlinov 10) Y. Kharlov 20) SM electr Integrat/Test xyz2) abc9) High Level L.Ray19) Slow Control M.Cherney12) D.Bonnet4) SM cosmic calibration xyz2) D.Silvermyr9) Fiber System F.Ronchetti6) I.Kotov17) SM Crate A. Palmeri5) J.Riso10) Conv. System abc18) A.Palmeri5) Jets M.Estienne4) J.Putscke7) Low Level O.Bourrion2) Data QA/QC C.Markert19) Module Test & Characteriz. A.Fantoni6) xyz11) Elect Commis. xyz9) J.Schambach19) SM Mec. Integration xyz2) J.Riso10) LED system xyz11) Trentalange13) Electrons C.Pruneau10) Trigger Commision S.Margetis15) 1) CERN, 2) IN2P3-Grenoble, 3) IN2P3 Subatech, 4) IN2P3-Strasburg, 5) INFN-Catania, 6) INFN-Frascati, 7) LBNL, 8) LLNL, 9) ORNL, 10) WSU, 11)IHEP, 12)Creighton, 13)UCLA, 14)Univ. of .Huston, 15) KentState Univ., 16) Purdue Univ., 17)Ohio State Univ., 18)Univ. of Tennessee, 19)Univ. of Texas p0/photons Van.Leeuwan7 Delagrange3) D.Hasch6) APD Test A.Badala’5) Ghazikhanian13 SM Insertion tooling H.Carduner3) Simulation B.Mayes14) F.Wang16)

  24. The Nuclear Physics group @LNF is experiencing moments of particular high activity, playing major roles at international level Pasquale Di Nezza LNF SC, Nov ’07

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