December 16 20081 Extraction of exclusive neutral pions electro-production cross sections in Hall Jefferson Laboratory. Eric FUCHEY Ph.D

Slides:



Advertisements
Similar presentations
FERRARA`S GROUP DISCUSSION COMPARISON BETWEEN OLD NTUPLA vs THE NEW ONE.
Advertisements

Don Priebe - November New York and the 1099-R Everyone knows that... If its on a 1099-R NY doesnt tax it So where do I put it on the IT-201?
1 Mesures détalement Mesures détalement par SiProt avec TimePix CEA Saclay Réunion RESIST 7 avril 2008 David ATTIÉ
SiTPC status in Saclay David Attié SiTPC Phone Meeting,
Z cross-section with simultaneous fit Luca Lista for: Annapaola De Cosa, Michele De Gruttola, Salvatore Di Guida, Francesco Fabozzi, Pasquale Noli, Davide.
INSTITUTE FOR CYBER SECURITY April Access Control and Semantic Web Technologies Ravi Sandhu Executive Director and Endowed Chair Institute for Cyber.
GL10 – December 8-9, Grey literature in French digital repositories: a survey J. Schöpfel (University of Lille 3) C. Stock (INIST-CNRS)
Sep 3, 2008NVOSS Mobile VO Mike Fitzpatrick NOAO.
P-Y BERTIN Jefferson Laboratory and Université BLAISE PASCAL- IN2P3/CNRS for the DVCS HALL A collaboration 0 exclusive electro production Q 2 =2.3 GeV.
E status report Alexandre Camsonne Hall A Jefferson Laboratory Hall A collaboration meeting December 13 th 2007.
Deeply Virtual Compton Scattering on the neutron in. Dr. Malek MAZOUZ Ph.D. Defense, Grenoble 8 December 2006 GPDs Physics case n-DVCS experimental setup.
Deeply Virtual Compton Scattering on the neutron Slides by Malek MAZOUZ June 21 st 2007 Physics case n-DVCS experimental setup Analysis method Results.
L/T separation in the 3 He(e,ep) reaction Javier R. Vignote and Eric Voutier Laboratoire de Physique Subatomique et de Cosmologie, Grenoble, France Jlab.
Deeply Virtual Compton Scattering from the Proton and the Neutron ( E & E03-106: DVCS/nDVCS ) Hall A Collaboration MeetingDecember 6, 2005 Spokespersons:
Measuring the Neutron and 3 He Spin Structure at Low Q 2 Vincent Sulkosky for the JLab Hall A Collaboration College of William and Mary, Williamsburg VA.
Deeply Virtual Compton JLab Franck Sabatié CEA Saclay On behalf of the Hall A and Hall B collaborations Pacific Spin 07 - Vancouver August.
Masterclass Introduction to hands-on Exercise Aim of the exercise Find out what happens in proton-proton collisions at the LHC as seen by the ATLAS.
Masterclass Introduction to hands-on Exercise Aim of the exercise Identify electrons, muons, neutrinos in the ATLAS detector Types of Events (particles.
10/04/20081 TWG of ESF Committee 10 April 2008 Franck Sébert Head of unit DG EMPL/I/1 Relations with Control Authorities Action plan to strengthen the.
Determination of Forward and Futures Prices Chapter 5 Options, Futures, and Other Derivatives, 7th Edition, Copyright © John C. Hull
Competitive Intelligence – It’s Not Just For Spies! March 10, 2008 Linda Rink President.
© IPC, IPC Initiative Future of Mail by Air; why we started.
02/12/ a tutorial on Markov Chain Monte Carlo (MCMC) Dima Damen Maths Club December 2 nd 2008.
TRD alignment with Muenster cosmics, D. Miskowiec, TRD status, 07-Jun TRD alignment with (German) cosmics Dariusz Miśkowiec (GSI), Eva Sicking (Uni.
Modular – Flexible – Networked
UK Higher Education library statistics The role of SCONUL.
Target Fragmentation studies at JLab M.Osipenko in collaboration with L. Trentadue and F. Ceccopieri, May 20,SIR2005, JLab, Newport News, VA CLAS Collaboration.
Brahim MorenoStudents' seminar at Bosen Workshop ΔVCS and Generalized Parton Distributions
Experimental requirements for GPD measurements at JLab energies. Detector that ensures exclusivity of process, measurement of complete final state Measure.
Why Studying n-DVCS ? Eric Voutier n-DVCS gives access to the least known and constrained GPD, E 0 because F 1 (t) is small 0 because of cancelation of.
Study of two pion channel from photoproduction on the deuteron Lewis Graham Proposal Phys 745 Class May 6, 2009.
Proton polarization measurements in π° photo-production --On behalf of the Jefferson Lab Hall C GEp-III and GEp-2γ collaboration Wei Luo Lanzhou University.
Backward meson production at CLAS Alex Kubarovsky (RPI/Uconn) Kyungseon Joo (Uconn) Valery Kubarovsky (Jlab) Paul Stoler (RPI) Exclusive Meson Production.
Hall A 12 GeV DVCS Status report December 16th 2013 Hall A collaboration meeting Alexandre Camsonne.
Proton polarization measurements in π° photo- production --on behalf of the Jefferson Lab Hall C GEp-III and GEp-2 γ collaboration 2010 Annual Fall Meeting.
Crossed Channel Compton Scattering Michael Düren and George Serbanut, II. Phys. Institut, - some remarks on cross sections and background processes  
Deeply Virtual Exclusive Reactions with CLAS Valery Kubarovsky Jefferson Lab ICHEP July 22, 2010, Paris, France.
Possibility for Double DVCS measurement in Hall A Alexandre Camsonne SBS Meeting June 4 th 2013.
Rosen07 Two-Photon Exchange Status Update James Johnson Northwestern University & Argonne National Lab For the Rosen07 Collaboration.
Nucleon resonance studies in π + π - electroproduction off protons at high photon virtualities E. Isupov, EMIN-2009.
Exclusive π 0 electroproduction in the resonance region. Nikolay Markov, Maurizio Ungaro, Kyungseon Joo University of Connecticut Hadron spectroscopy meeting.
E. Penel-NottarisLaboratoire de Physique Subatomique et de Cosmologie de Grenoble 1 July, 7 th, 2004 Quasi-elastic 3 He(e,e’p) experiment (E89-044) at.
Deeply Virtual Compton Scattering on the neutron Malek MAZOUZ LPSC Grenoble EINN 2005September 23 rd 2005.
Deeply Virtual Compton Scattering in JLAB Hall A
Oct 6, 2008Amaresh Datta (UMass) 1 Double-Longitudinal Spin Asymmetry in Non-identified Charged Hadron Production at pp Collision at √s = 62.4 GeV at Amaresh.
DVCS – Hall A Study of the Background Noise HUGS 2008 Florian ITARD.
Beijing, Sept 2nd 2004 Rachele Di Salvo Beam asymmetry in meson photoproduction on deuteron targets at GRAAL MENU2004 Meson-Nucleon Physics and the Structure.
Calorimetry for Deeply Virtual Compton Scattering in Hall A Alexandre Camsonne Hall A Jefferson Laboratory Workshop on General Purpose High Resolution.
E & E status report Maxime DEFURNE CEA-Saclay/Irfu/SPhN 1.
Harut Avakian (Jlab) DVCS results with unpolarized and polarized target Introduction Event selection MC simulations and radiative corrections DVCS with.
Jan. 18, 2008 Hall C Meeting L. Yuan/Hampton U.. Outline HKS experimental goals HKS experimental setup Issues on spectrometer system calibration Calibration.
L/T separation in the 3 He(e,e’p) reaction at parallel kinematics Freija Descamps Supervisors: Ron Gilman Eric Voutier Co-supervisor: Jean Mougey.
JLab, October 31, 2008 WACS in 12 GeV era 1 GPDs Wide-Angle Compton Scattering pi-0 photo-production in 12 GeV era B. Wojtsekhowski Outline WACS and other.
Georgie Mbianda 1 for the Baryon (E01-002) Collaboration 1 University of the Witwatersrand, Johannesburg Exclusive Electroproduction of π + and η mesons.
The EG4 Experiment: A Low Q 2 Determination of the GDH Integral Sarah K. Phillips The University of New Hampshire JLab Users Group Meeting June 9, 2009.
Time-like Compton Scattering with CLAS12 S. Stepanyan (JLAB) CLAS12 European Workshop February 25-28, 2009, Genova, Italy.
Deeply virtual  0 electroproduction measured with CLAS.
December, Calibration of electromagnetic calorimeter of Hall A DVCS experiment Eric FUCHEY Ph.D Laboratoire de Physique Corpusculaire.
Overview of recent photon beam runs at CLAS CLAS12 European Workshop, Feb , Genoa, Italy Ken Livingston, University of Glasgow Tagged photons.
1 Kinematics Plots Single event : electron, positive charged pion Under Condition : W ≥ 2GeV, Reaction : ep→e’π + ( X ) Scaling Update Report Apr.09,’07.
Envisioned PbWO4 detector Wide-Angle Compton Scattering at JLab-12 GeV with a neutral-particle detector With much input from B. Wojtsekhowski and P. Kroll.
Mesons in ep missing spectra G. M. Urciuoli. Meson photoproduction provide a good tool to study nucleon resonances. For example, a large number of resonances.
Cross section of the process
Kaons Propagation Through Nuclei
Precision Measurement of the Electroproduction of p0 Near Threshold:
Elastic Scattering in Electromagnetism
Exclusive Neutral Pion Production at JLab Hall A
Wei Luo Lanzhou University 2011 Hall C User Meeting January 14, 2011
Update of RG-A Hadron Structure Analyses
First results on Deep Virtual Compton Scattering in Hall A
Presentation transcript:

December Extraction of exclusive neutral pions electro-production cross sections in Hall Jefferson Laboratory. Eric FUCHEY Ph.D Laboratoire de Physique Corpusculaire UMR 6533 CNRS/IN2P3 Université Blaise Pascal Clermont-Ferrand

December Outline 1– Motivations 2– 0 electroproduction formalismes –Kinematical variables –Formalismes 3– Experimental layout 4– Cross sections extraction –Calibration –Extraction method –Selection cuts 5– Conclusion and perspectives

December Outline 1– Motivations 2– 0 electroproduction formalismes –Kinematical variables –Formalismes 3– Experimental layout 4– Cross sections extraction –Calibration –Extraction method –Selection cuts 5– Conclusion and perspectives

December interest DVCS is the smartest way to get access to GPDs theoretically. In most of DVCS experiments, 0 production ( with ) is an important by-product (Pollution for DVCS analysis)

December Outline 1– Motivations 2– 0 electroproduction formalismes –Kinematical variables –Formalismes 3– Experimental layout 4– Cross sections extraction –Calibration –Extraction method –Selection cuts 5– Conclusion and perspectives

December Kinematic variables Virtuality: Momentum fraction: Quadri transfert to proton: *- azimuthal angle: *-p CM energy: Transverse momentum:

December Formalismes Drechsel-Tiator (Nucl.Part.Phys.18(1992) ): with and More « intuitive » formalisme

December Formalismes Levelt-Mulders (Phys.Rev.D.49(1994)96-113) : Show an explicit dependence in transverse momentum

December Formalismes: comparison Interest: Being able to get easily cross sections from Drechsel- Tiator as function of pion transverse momentum: With :

December Outline 1– Motivations 2– 0 electroproduction formalismes –Kinematical variables –Formalismes 3- Experimental layout 4– Extraction des section efficaces –Calibration –Extraction method –Selection cuts 5– Conclusion and perspectives

December DVCS experiment Incident beam : E = 6 GeV, L ~ cm -2 s -1 during experiment –Scattered electron measured by HRS –2 photons issued from 0 measured by 132 PbF 2 blocks calorimeter –Recoil proton detected by proton array -> not used

December Outline 1– Motivations 2– 0 electroproduction formalismes –Kinematical variables –Formalismes 3– Experimental layout 4– Cross sections extraction –Calibration –Extraction method –Selection cuts 5– Conclusion and perspectives

December Calibration Goal : searching coefficients to apply to calorimeter blocks in order to: –bring their reconstructed missing mass squared value to the proton missing mass squared. –Bring then simulated missing mass mean and resolution to real ones Mp2Mp2

December Calibration Calibration has been performed for set of Kin3 0 data and our set of Kin3 0 simulated.

December Extraction method Kinematical domains : –Kin2: x Bj = 0.36, Q 2 = 1.9 GeV 2 –Kin3: x Bj = 0.36, Q 2 = 2.3 GeV 2 Analysis made according to t min -t. Fitting real data with simulated to take into account of acceptance effect.

December Extraction method Principle: compare expected number of counts for data to expected number of counts for simulated No access What we want to extract

December Selection cuts Missing mass cut to ensure exclusivity Each photon is in a calibrated block, and E > 1.0 GeV k = pHRS +/- 4.5% ; r-function > cm < z vtx < 7.5 cm.

December Fit results Fit has been performed for helicity-independent cross section and helicity-dependent cross section However, still not able to extract cross sections (debugging…) 2 /NDF = /NDF = 0.76

December Outline 1– Motivations 2– 0 electroproduction formalismes –Kinematical variables –Formalismes 3– Experimental layout 4– Cross sections extraction –Calibration –Extraction method –Selection cuts 5– Conclusion and perspectives

December – Conclusion / perspectives 0 electroproduction cross section extraction in Hall A is in progress. Calibration has been performed (see talk on calibration this afternoon) Once first results obtained: –Optimizing some selection cuts –Study evolution in other variables: x Bj, Q 2, W