P. Rossi JLAB12 Collaboration Meeting Roma, 10 Giugno 2010 JLAB12-LNF: outline PROCESSI FISICI IN STUDIO (analisi, pubblicazioni, ecc) - TMDs con target non-pol./pol. longitudinalmente - Produzione semi-inclusiva (Marco’s talk) - Generatore Monte Carlo per TMD (Delia’s talk) - Fotoproduzione di iperoni HARDWARE - RICH - Rivelatore neutroni (CND) MILESTONES RAGGIUNTE MILESTONES X 2011 P. Rossi JLAB12 Collaboration Meeting Roma, 10 Giugno 2010

JLAB12- Gruppo LNF 2010 Ricercatori/Tecnologi Tecnici M. Aghasyan (Ass. Ric.), S. Anefalos Pereira (Art. 23), R. Baldini (Dir.), E. De Sanctis (Dir.), L. Hovsepyan (Assoc.), M. Mirazita (Ric.), J. de Oliveira Echeimberg (Assoc.), E. Polli (I Tecn.), P.Rossi (Resp). Tecnici A. Orlandi, W. Pesci, A. Viticchie’ Full Time Equivalent Ricercatori: 7.3 Tecnologi: 1 TOTALE = 8.3 FTE Tecnici:0.6

Transverse Momentum parton Distribution functions (TMDs) In the collinear approximation: DIS PDF f1u Parton transverse momentum more complex PDF TMDs (E, k) (E’, k’) e’ N e leading twist TMDs

0 0/+/- 0/+ 0/+/- 0/+/- SIDIS Cross Section Unpol. Target dh  dq(y)FF 0 Unpol. Target e1-dvcs 2005 data (5.7 GeV) 0/+/- 0/+ Long. Pol. Target eg1-dvcs 2009 data (6 GeV) 0/+/- 0/+/- FUL Trans. Pol. Target Experiment in preparation Test run April 2011 18 structure functions Bacchetta et al., JHEP 0702:093,2007

0 Beam Spin Asymmetry: epe’0X Preliminary M Aghasyan, LNF-INFN Mher Aghasyan’s analysis Drop with PT below 1 GeV/c + Preliminary M Aghasyan, LNF-INFN Sivers’ type contribution Collins’ type contribution ALU(sin) Comparable BSA for p0 and p+  Indication that the Collins contribution couldn’t be the dominating one Deep Processes PWG Committee review CLAS ANALYSIS note 1st draft (Oct, 2008) CLAS ANALYSIS note 2nd draft (June, 2010)

Experiment E05-113: eg1-dvcs Polarized target (NH3/ND3) Inner Calorimeter (424 PbWO4 crystals) to detect high energy photons at forward lab angles. IC 13o 50o Data taking february-september 2009 (114 days of running) Beam Polarization 80% <NH3 Polarization> 77% <ND3 Polarization> 28%

Experiment E05-113: eg1-dvcs Mher Aghasyan’s work Data quality checks. EC photon energy correction Charged asymmetry (TN0001 charged asymmetry) http://clasweb.jlab.org/rungroups/eg1-dvcs/wiki/index.php/Technical_Notes Analysis Fsin()LU from NH3, ND3 and c12 for p0/+/- FLL and Fcos()LL from NH3 and ND3 for p0/+/- (p, d) New way to extract Dilution factor for eg1-dvcs Presentation from Mher in one of the next JLAB12 Coll. Meet.

Experiment E05-113: eg1-dvcs Sergio Pereira’s work Momentum Correction e p  e’ p X events (initial state Bethe-Heitler events  1% 20<<25 2.25<p<2.5 GeV/c p/p the corrections are always less than 1% the majority of cases are less than 0.5% Fsin2()UL from NH3 (p) for 0/+

Hyperon photoproduction: nK+- Physics Motivation: search for the “missing” resonances in the KY channel First “complete” look at Y production on neutron 1.57 < W < 3.6 GeV 10 < KLab < 140 Deuteron target, proton spectator, FSI ~ 10% Modeled with K+ and K*(892) in Regge trajectories(no resonances) Ghent model, Ryckebuschet al. S. Anefalos Pereira et al., (CLAS) Phys LettB 688, 289 (2010)

RICH detector Sostituire 2 settori del LTCC con un RICH detector 3 cm 80 cm GeV/c 1 2 3 4 5 6 7 8 9 10 p/K TOF LTCC HTCC p/p K/p Hall B wants to propose the RICH detector to DOE as an upgrade of CLAS12 and build all the 6 sectors

RICH detector L. Pappalardo’s talk (Ferrara) 2 options under investigation: proximity focusing RICH focusing RICH Challenging project, crucial to minimize: Detector area (high cost due to large surface and expensive detectors for visible light) Material badget (interference with TOF) Monte Carlo simulation with GEANT3 in progress radiator: C6F14/Aerogel Detected Cherenkov light: visible Photon detector: Multi-Anode PMT (0.3/0.6/1/2 cm pixel) Preliminary results: 5 -K separation @ 8 GeV/c reachable (3 cm AEROGEL, 0.6 cm pad size, 100 cm gap) Monte Carlo simulation with GEANT4 in progress ANL group Misha Osipenko (Genova) L. Pappalardo’s talk (Ferrara)

RICH detector readout Multi-anode PMTs Requests: visible light detection compact single p.e. detection small pad size Multi-anode PMTs MAPMT Dimentional outline (mm3) Effective area (mm2) Pixel size (mm2) H8500 52x52x28 49x49 5.8x5.8 (8x8) H9500 52x52x33.3 2.8x2.8 (16x16) Pros: excellent packing factor (89%) Cons: non optimized for single p.e. detection (not recommended by Hamamatsu) R7600 R7600 R7600-M4 R7600-M16 R7600-M64 Pros: optimized for single photon detection (recommended by Hamamatsu) Cons: quite sizeble dead area (324/660 = 49%)

PRIN for RICH prototype “A RICH detector with multilayer aerogel and SiPM photodetector” Build a prototype to be used for the identification of particles up to 10 GeV/c Innovative techniques of photodetection and aerogel production will be exploited: aerogel block radiators with varying refraction index photodetection plane for Cherenkov radiations assembled with SiPM photodetectors The signal to noise ratio will be maximized with the use of: fast readout electronics on SiPM's in order to reduce the influence of SiPM dark counts by using very short trigger time (a few nanoseconds) windows optical or mechanical light focalizers able to reduce the dead area in the photodetection plane Bari+Catania+ Genova+Roma I + Frascati+Ferrara Regardless of PRIN’s approval we plan to realize the prototype + test of Multi-anode PMTs (with Glasgow people)

“Probing Strangeness in Hard Processes” Workshop: “Probing Strangeness in Hard Processes” October 18-21, 2010 PROPOSTA FORMATIVA DELLA COMMISSIONE SCIENTIFICA NAZIONALE III (contributo di 7000 Euro) La missione per i dipendenti INFN (tempo indet., art 23 e 15) viene pagata sui fondi di formazione

Central Neutron Detector Measurement of n_DVCS (LOI PAC34) Limitation: High magnetic field (2-5 Testa) Limited space (mainly for the read-out) CLAS12 Central Detector Neutral Detector Participation to the SiPM tests in Genova

Milestones for 2010 31-12-2010 sottomissione per pubblicazione  d  - K+ (p) 100% test sui prototipi del rivelatore centrale per neutroni di CLAS12 30-09-2010 Avanzamento prototipazione RICH per CLAS12

JLAB12- Gruppo LNF 2011 Ricercatori/Tecnologi Tecnici M. Aghasyan (Ass. Ric.), S. Anefalos Pereira (Art. 23), E. De Sanctis (Dir.), D. Hasch (I Ric.), L. Hovsepyan (Assoc.), V. Lucherini (Dir.), M. Mirazita (Ric.), J. de Oliveira Echeimberg (Assoc.), S. Pisano (Assoc.), E. Polli (I Tecn.), P.Rossi (Resp). Tecnici A. Orlandi, A. Viticchie’ Full Time Equivalent Ricercatori: 9.5 Tecnologi: 1 TOTALE = 10.5 FTE Tecnici:0.4-0.6

Milestones 2011 Milestones Termine review e sottomissione articolo “Beam Spin Asymmetries in Semi-Inclusive 0 production” Conclusione analisi e sottomissione nota analisi “Semi-inclusive  polarization at CLAS” Continuazione Analisi “Measurement of the spin azimuthal asymmetry of the r0 and r+ in polarized electron Semi-Inclusive Deep-Inelastic Scattering experiments” “Measurement of the spin azimuthal asymmetry of the 0/+/- in polarized electron Semi-Inclusive Deep-Inelastic Scattering experiments” Mher? Sviluppo Generatore Monte Carlo per TMDs Test run HDice target con elettroni (Aprile 2011) Tests prototipo RICH (aerogel + photon detector) CND completamento tests e definizione elettronica