What we will need for Jan 19 in simulations

Richard SetoFOCAL meeting

Jan 6, 2008

Review

Jan 19 – firm date Reviewers

Matthias, Elka, Christine, (john H, mike L)

NSAC milestones- Physics Goals

Year # MileStone FOCAL?

2012

DM8 Determine gluon densities at low x in cold nuclei via p+ Au or d + Au collisions.

Required

2013

HP12 Utilize polarized proton collisions at center of mass energies of 200 and 500 GeV, in combination with global QCD analyses, to determine if gluons have appreciable polarization over any range of momentum fraction between 1 and 30% of the momentum of a polarized proton.

Low-xDirect

2014

DM10(new)

Measure jet and photon production and their correlations in A≈200 ion+ion collisions at energies from medium RHIC energies to the highest achievable energies at LHC.DM10 captures efforts to measure jet correlations over a span of energies at RHIC and a new program using the CERN Large Hadron Collider and its ALICE, ATLAS and CMS detectors.

Marginal without FOCAL

2015

HP13 (new)

Test unique QCD predictions for relation between single-transverse spin phenomena in p-p scattering and those observed in deep-inelastic lepton scatteringNew Milestone HP13 reflects the intense activity and theoretical breakthroughs of recent years in understanding the parton distribution functions accessed in spin asymmetries for hard-scattering reactions involving a transversely polarized proton. This leads to new experimental opportunities to test all our concepts for analyzing hard scattering with perturbative QCD.

Required

G

-Jet AuAu

transversespin phenomena

pA physics – nuclear gluon pdf

em1+em2

em1+em2+strips

FOCAL Internal Review

Agenda Overview

EM ID performance- Sky/edouard/ondrej photon performance – Sky/edouard/ondrej-richard (richard-geant4) pi0 peaks 2-track – Sky-Edouard-ondrej-rich

Transverse physics – John L Jet direction performance - Mickey pi0 performance in jet – Rich(2track), Richard (geant4) Collins – Sivers?

Delta G(x) – Mickey Performance plots gamma/pi0 from richard vs pt and angle-

Richard(geant4), Mickey Possible 2pi0 channel – pythia plots (?) -rich

pA physics – Pythia level photon isolation+physics limits - rich jet performance Mickey Carla? Structure function

AuAu – some performance plots – Carla pi0, photon performance – Richard(Geant4)

Initial work (Status checks today)

Recode new geometry (Sky) PISA runs of pp-spin=longitudinal, transverse,

pA, AuAu-small amount (Ondrej) Recode new algorithm of edouards to make

NCC module (Edouard/Ondrej) Code up pi0/gamma stuff (Richard)

Work with mickey to make this available for Delta G?

Find good way to pack information into NCC module (Richard- with help Mickey/Ondrej/Edouard)

Coverage in x ans shat~Qsq

x2

shat~qsq

Resolutions

EM angular – 6mr energy – 23%/E

Jet (from mickey

PT

jetresolution

x2 resolution – no radiationDetector smearing only

Note: radiative smearingis at least as big as detectorsmearing(use NNNNNLO QCD)

x2

x2

shat~qsq

Task in dAu

qsq = 30, 100, 1000

gluons

unknown

x2

known

1) convert this

2) using this

3) to get this

CTEQ5L

-present knowledge-NMC data

q

qg

q

q g

isolatedphotons

Compton

Annihilation

x2

x2

dN/dx2