Parametrization of nuclear parton distributions

Slides:

Advertisements

Similar presentations

BigBite K.Egiyan Probabilities of SRC in Nuclei Measured with A(e,e / ) Reactions K. Egiyan (Yerevan Physics Institute, Yerevan, Armenia and Jefferson.

Advertisements

PR : Precision Measurements and Studies of a Possible Nuclear Dependence of R = L / T Simona Malace - contact (JLab) Eric Christy (Hampton U.),

Studying Nuclear Effects and Structure Functions at the NuMI Facility Jorge G. Morfín Fermilab NuFact’02 London, July 2002.

1 Global reanalysis of nuclear PDFs Kari J. Eskola, Department of Physics, University of Jyväskylä Helsinki Institute of Physics hep-ph/ , in collaboration.

1 The and -Z Exchange Corrections to Parity Violating Elastic Scattering 周海清 / 东南大学物理系 based on PRL99,262001(2007) in collaboration with C.W.Kao, S.N.Yang.

I : A Unified Model for inelasitc e-N and neutrino-N cross sections at all Q 2 Arie Bodek, Inkyu Park- U. Rochester Un-ki Yang- U. Chicago DIS 2005 Madison,

ΔG/G Extraction From High- P t Hadron Pairs at COMPASS Ahmed El Alaoui Nuclear Physics School, Erice, September 2007 On Behalf Of COMPASS Collaboration.

IV Convegno Nazionale Fisica ALICE, Palau, Andrea Dainese 1 Andrea Dainese (INFN Legnaro) Charm as a probe of small-x gluons at LHC.

MeAsurement of F 2 n /F 2 p, d/u RAtios and A=3 EMC Effect in Deep Inelastic Electron Scattering Off the Tritium and Helium MirrOr Nuclei J. Gomez for.

1 Partonic Substructure of Nucleons and Nuclei with Dimuon Production Partonic structures of the nucleons and nuclei with dimuon production –Overview and.

May 2005CTEQ Summer School1 Global Analysis of QCD and Parton Distribution Functions Dan Stump Department of Physics and Astronomy Michigan State University.

Sept 2003PHYSTAT11 … of short-distance processes using perturbative QCD (NLO) The challenge of Global Analysis is to construct a set of PDF’s with good.

AAC analysis of polarized parton distributions with uncertainties Shunzo Kumano, Saga University 12th.

Does a nucleon appears different when inside a nucleus ? Patricia Solvignon Argonne National Laboratory Postdoctoral Research Symposium September 11-12,

1 EPS08 - An improved global analysis of nuclear PDFs including RHIC data Kari J. Eskola Department of Physics, University of Jyväskylä Helsinki Institute.

Experimental Approach to Nuclear Quark Distributions (Rolf Ent – EIC /15/04) One of two tag-team presentations to show why an EIC is optimal to access.

Eli Piasetzky Tel Aviv University, Israel Free neutron structure function Work done in collaboration with: L. B. Weinstein (ODU) D. Higinbotham, J. Gomez.

QCD analysis of the nucleon spin structure function data in next to leading order in α S The polarized gluon distribution in the nucleon Jechiel Lichtenstadt.

Duality: Recent and Future Results Ioana Niculescu James Madison University Hall C “Summer” Workshop.

EMC effect in few-body nuclei at large x Patricia Solvignon Argonne National Laboratory Elba X Workshop Electron-Nucleus Scattering X June 23-27, 2008.

Measurements of Nuclear Structure Functions at small Bjorken-x with EIC --An extension of Jlab 12 GeV proposal PR Lingyan Zhu Jlab proposal PRL10-012:

1/8 Constraint on  g(x) from  0 production at RHIC Masanori Hirai Tokyo Tech (Asymmetry Analysis collaboration) With S. Kumano and N. Saito Phys.Rev.D74,

Report from India Topical Conference on Hadron Collider Physics XIII Jan 14-20, TIFR, India Naohito Saito RIKEN/ RIKEN BNL Research Center.

High-Energy Hadron Physics at J-PARC Shunzo Kumano High Energy Accelerator Research Organization (KEK) Graduate University for Advanced Studies (GUAS)

Neutrino cross sections in few hundred MeV energy region Jan T. Sobczyk Institute of Theoretical Physics, University of Wrocław (in collaboration with.

HERMES によるパートン helicity 分布関数の QCD 解析 Tokyo Inst. of Tech. 1. Quantum Chromo-Dynamics (QCD) 2. Parton Helicity Distribution and Nucleon Spin Problem 3.

Robert Pak (BNL) 2012 RHIC & AGS Annual Users' Meeting 0 Energy Ro Robert Pak for PHENIX Collaboration.

Structure Functions in the Nucleon Shunzo Kumano High Energy Accelerator Research Organization (KEK) Graduate University for Advanced Studies (GUAS) April.

The Importance of Higher Twist Corrections in Polarized DIS E. Leader, A. Sidorov, D. Stamenov, LSS 11th International Workshop on Deep Inelastic Scattering.

Precise Measurement of  + /  - Ratios in Semi-inclusive DIS Part I: Charge Symmetry Violating Quark Distributions (PR ) Part II: Unraveling the.

New measurements of the EMC effect in few-body nuclei John Arrington, Physics Division, Argonne Second meeting of the APS Topical Group on Hadron Physics.

New Measurement of the EMC effect for Light Nuclei and Global Study of the A-Dependence Patricia Solvignon Argonne National Laboratory ECT 2008 Workshop.

New global study of the A-dependence of the EMC effect and the extrapolation to nuclear matter Patricia Solvignon Argonne National Laboratory Physics Division.

Kazutaka Sudoh (KEK) INPC2007, Tokyo June 5, 2007 Global Analysis of Hadron-production Data in e + e - Annihilation for Determining Fragmentation Functions.

E-906/SeaQuest: Parton Energy Loss and Antishadowing Benjamin W. Miller of Abilene Christian University For E-906/SeaQuest Abstract In addition to measuring.

Nuclear structure and the flavor dependence of the EMC effect

Spin physics with COMPASS

x>1: Short Range Correlations and “Superfast” Quarks

Short Range NN Correlations (from Inclusive Cross Sections)

Qin-Tao Song High Energy Accelerator Research Organization (KEK)

Nuclear Effects in Hadron Production at HERMES

Global QCD Analysis and Collider Phenomenology — CTEQ

Hadron-structure studies at a neutrino factory

Theory : phenomenology support 12 GeV

General parton distribution and structure of the hadrons

Measurements of quark transversity and orbital motion in hard scattering Yoshiyuki Miyachi Tokyo Institute of Technology.

Nuclear Effects in the Proton-Deuteron Drell-Yan Reaction.

Spin of the proton and orbital motion of quarks

Determination of nuclear PDFs in the EIC era (Status of NPDFs and our requests to EIC experimentalists) Shunzo Kumano High Energy Accelerator Research.

Possible studies of structure functions at JLab

Masanori HIRAI 2006, Nov 9, Tokyo-u

Nuclear Duality (and related topics…)

Nuclear excitations in relativistic nuclear models

Large-X PDFs in the Drell-Yan Process

Searching for intrinsic motion effects in SIDIS

High Energy Phenomenology Group, GFPAE IF – UFRGS, Porto Alegre

Nuclear Modifications of Parton Distribution Functions

Single Spin Asymmetry with a Transversely Polarized

Shadowing & quenching two stories in nuclear colliding

Proton structure at low Q2

University of Tennessee

A QCD evolution equation and

Structure of the Nucleon and Nuclei in Lepton Scattering

Internal structure of f0(980) meson by fragmentation functions

G. Smirnov Joint Institute for Nuclear Research, Dubna, Russia and

Duality in Nuclei: The EMC Effect

How to measure the charm content of the proton?

New Results on the EMC Effect at Large x in Light to Heavy Nuclei

Azimuthal dependence in unpolarized proton-induced Drell-Yan processes

E (“x>1”) PAC47 Jeopardy presentation John Arrington

Presentation transcript:

Parametrization of nuclear parton distributions Shunzo Kumano Saga University Collaborators: M. Hirai (Saga), M. Miyama (Tokyo) Ref. SAGA-HE-170, to be submitted kumanos@cc.saga-u.ac.jp http://www-hs.phys.saga-u.ac.jp International Symposium on Nuclear Physics Mumbai, India, Dec. 18-22, 2000 Dec. 20, 2000

- Contents - Introduction parton distributions in the nucleon parton distributions in nuclei EMC effect, shadowing Parametrization of nuclear parton distributions 1. functional form of fiA(x) 2. constraints: A dependence, conservation laws 3. 2 fitting to experimental data 4. results: optimum nuclear parton distributions Summary 

Current status on unpolarized distributions in the nucleon Parton distributions are determined by fitting various experimental data. electron/muon neutrino Drell-Yan direct photon ... (1) (3) (2)

Available data for determining parton distributions (Ref. MRST, hep/ph-9803445)

Recent unpolarized distributions CTEQ5, Eur. Phys. J. C12 (2000) 375 GRV98, Eur. Phys. J. C5 (1998) 461 MRST99, Eur. Phys. J. C14 (2000) 133 Unpolarized distributions are well known in the nucleon.

parton distributions in nuclei Nuclear modification of F2A / F2D is well known in electron/muon scattering. Fermi motion shadowing original EMC finding (binding, subnucleon?)

Convolution

Parametrization of nuclear parton distributions without relying on models!

 

A dependence  “surface” “volume” R= r0A1/3 Ref. I. Sick and D. Day, Phys. Lett. B 274 (1992)  R= r0A1/3 “surface” “volume”

7 parameters for 309 data points

x Experimental data on F2A/F2D Q2 (GeV2) NMC: He, Li, C, Ca SLAC: He, Be, C, Al, Ca, Fe, Ag, Au EMC: C, Ca, Cu, Sn E665: C, Ca, Xe, Pb BCDMS: N, Fe Q2 (GeV2) x

DGLAP Q2 evolution equation x  divided　into Nx step t (=lnQ2)  divided　into Nt step See our studies in Comput. Phys. Commu. 94 (1996) 185; 108 (1998) 38; 111 (1998) 150. Evolution programs could be obtained upon request. See http://www-hs.phys.saga-u.ac.jp/program.html.

Analysis results

Obtained F2A/F2D

2 contributions * next figs *

Example of 2 contributions

Weight functions wi(x,A)

Errors in the weight functions

Obtained parton distributions

Summary