# Presentation: 273320

## RHIC Spin Group at BNL

|  | FY2006 | FY2007 |
| --- | --- | --- |
| STAR
Physics | Les Bland
Akio Ogawa
(SBU + Zagreb students) | + Andrew Gordon
+ Hiromi Okada |
|  | FPD++:  
jet-like AN; 
 | FMS:  
ALL(); AN; 
gAu(x) |
| PHENIX
Physics | Gerry Bunce
Sasha Bazilevsky |  |
|  | ALL() | ALL() |
| Polarimetry | Sandro Bravar
Ron Gill (0.5) | Sasha Bazlevsky
Boris Morozov |
|  | Gas-jet target; carbon polarimeters |  |

## Personel RHIC Spin Group

_**Gerry Bunce**_—Group Leader, RHIC Spin Group; Deputy Group Leader, RBRC Experiment Group; Spokesman, RHIC Spin Collaboration; Chair, Research Plan for Spin Physics at RHIC (2005); polarimetry; PHENIX.
_**Les Bland**_—Deputy Group Leader, leads STAR spin in RHIC Spin Group; PI for Forward Pion Detector, FPD++ (2006), Forward Meson Spectrometer (2007); co-chair, STAR Spin Physics Group 1999-2004; developed case for Endcap Calorimeter at IU.
_**Akio Ogawa**_—STAR, co-chair STAR Spin Physics Group 2004-06; FPD, FPD++, FMS; organizer of RSC 2003-2005; Belle polarized quark fragmentation analysis (RBRC collaboration).
_**Sasha Bazilevsky**_—PHENIX, calorimeter calibration, software, analysis; leads A_LL analysis group; sigma(pi^0), E_T analysis; organizer of RSC 2005-present, PHENIX Spin Working Group coordinator; leading Polarimetry analysis group.
_**Boris Morozov**_---Polarimetry—developing detector improvements, Tandem study; Star FMS support; Phenix Muon Cherenkov study.
_**Ron Gill**_—Polarimetry; Physics Safety Officer.
_**Andrew Gordon**_---Begins on Star FMS July 2007.
_**Hiromi Okada**_---STAR FMS; developed polarized jet polarimeter (thesis).

## Planned RHIC Spin Group

- Group Leader: G. Bunce
- Deputy Group Leader: L. Bland
- Secretary: M. Echmalian (0.5 FTE)
- STAR: L. Bland (Leader), A. Ogawa (Assoc. Phys.), A. Gordon (Assist. Phys.), H. Okada (Post Doc) + Post Doc (2008)
- PHENIX: G. Bunce (Leader), A. Bazilevsky (Assoc. Phys.)
-      + Jr. Staff  (2008)
- Polarimetry: A. Bazilevsky (Leader), B. Morozov (Phys.), R. Gill (Phys., 0.5 FTE), G. Bunce + Post Doc (2008)
- Scientific FTEs: 7.5
- Support FTEs: 0.5

## RHIC Spin: Kyoto Spin2006 + 2006/7 Pubs

**STAR**
- Forward pi0: A_N(x,pT) (2006 data); _PRL_ pp, d-Au
- Jet A_LL (2005 data); _PRL_ (2003+4 data)
- 2007: Forward Meson Spectrometer
**PHENIX**
- pi0 A_LL (2006 200 GeV, 62 GeV); _PRD_ (2004 data)
- direct photon cross section _PRL_ (2003 data); 2005 data
**POLARIMETRY**
- jet: A_N 100 GeV _PLB_; 24 GeV (2004 data)
- neutron A_N 200 GeV PLB

## Plans for 2007-2010

**STAR:**
- 2007—build and test FMS
- 2008---measure gluon density in gold nucleus in d+Au collisions; measure transverse spin asymmetries for pi0-pi0 correlations
- 2009---complete A_LL measurements for prompt photon, photon-jet, photon-hadron correlations root(s)=200 GeV; transverse spin asymmetries at root(s)=500 GeV
- 2010---A_LL measurements for prompt photon, root(s)=500 GeV
- Possible transverse spin Drell-Yan Expt.

## Plans for 2007-2010

**PHENIX:**
- 2007—analysis of A_LL for pi0, charged pi; construction of muon trigger chambers and vertex detector
- 2008---A_LL (pi, photon); continue construction of muon trigger chambers, vertex detector
- 2009---install muon trigger chambers, 2 layers of vertex detector; complete A_LL measurements at root(s)=200 GeV; begin A_L measurements of W at root(s)=500 GeV
- 2010---install complete vertex detector, continue A_L for W and A_LL (pi, photon) at root(s)=500 GeV
- Possible transverse spin Drell-Yan expt.

## Plans for 2007-2010

**Polarimetry:**
- 2007---formed new polarimetry team (after departure of Bravar to U. Geneva); collaboration with CAD in place.
- 2007—completed 2005 jet and carbon polarimetry analysis (DP/P=6% each beam, DP^2/P^2=9.4%); complete polarization analysis for 2006, 200 GeV and 62 GeV; study detectors with <1 MeV carbon beam in Tandom (July 2007)
- 2008-2010---continue leading RHIC polarimetry analysis; possible development of new detectors and electronics (radiation hardness, dead layer correction in carbon tgt. polarimeters, pile-up concerns for higher intensities); possible development of unpolarized jet polarimeter
- Discussion: importance of maintaining strong collaboration with experiments: use of “detailees” for data monitoring and data analysis each year (2005: I. Nakagawa—RIKEN; O. Eyser—UC Riverside;
-      2006: I. Nakagawa; A. Hoffman—MIT; C. Camacho and H. Liu—Los Alamos; A. Dion and K. Boyle—Stony Brook)