PHENIX pp, dA, ATLAS pAand Hadron Fragmentation in Belle

PHENIX pp, dA ATLAS pA and Fragmentation in Belle, January 12th , 2015

Matthias Grosse Perdekamp, Illinois

(I) AL for W-Bosons W-trigger in run 13 Results, Plans

(II) Forward Spin physics wit the MPC

Transverse spin: AN : Results Gluon spin at small x: Results, Plans

(III) Nuclear effects: JdA in the MPC, DY in ATLAS

(IV) Fragmentation Functions from Belle for Proton Structure Studies (Francesca Giordano)

2

Summary of Physics Results from PHENIX & Belle 2011-2014

January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

PHENIX Preliminary result on, AL for W-Bosons at forward rapidity Presented at Spin 2014 in Beijing by Francesca Giordano NSF funded, UIUC led W-trigger for PHENIX muon arms expect Daniel Jumper’s thesis and publication in 2015Thesis result on MPC ALL to constrain contributions of low x Gluons to the Proton Spin Thesis 2013: Scott Wolin based on NSF funded, UIUC built forward PbWO4 Calorimeter (MPC)

Single transverse spin asymmetries, AN at forward- and mid-rapidity: Thesis 2011: John Koster John Koster, Phys.Rev. D90 (2014) 012006 based on NSF funded, UIUC built forward PbWO4 Calorimeter (MPC)

BellePreliminary result on Collins function of Kaons Presented at DIS 2014 in Warsaw by Francesca Giordano expect publication in 2015Precise measurement of Pion and Kaon Fragmentation Function in e+e-

Thesis 2013: Martin Leitgab (Maurice Goldhaber Research Scholarship) M. Leitgab Phys.Rev.Lett. 111 (2013) 062002

RHIC&AGSThesis award 2012

January 12th

(I) AL-W with the PHENIX Muon Arms

(A) UIUC/KEK led forward muon trigger upgrade for W-Physics completed in December 2011. Funded through NSF-MRI/JSPS. Performed well in runs 2012 and 2013.

(B) Two successful polarized proton runs at √s=510 GeV with combined ∫Ldt = 370pb-1 and polarizations of 52% and 56% in 2012 and 2013.

(C) First parity violating spin asymmetries for W-bosons with the PHENIX muon arms presented at Spin 2014 in Beijing in October.

RPC-3 north test assemblyat the Nuclear Physics Lab at UIUC

PHENIX pp, dA, ATLAS pA, Belle FFs

RPC-3 South

RPC-1 North

Quark and anti-quark helicity distributions

W-trigger project:90 collaborators from 17 institutionsled by N. Saito and M. Perdekamp

4

Undergraduate Research in the UIUC RPC LaboratoryThe PHENIX W-Upgrade was Funded by an NSF MRI

Undergraduate students

18 UIUC, 7 ACU, 2 Muhlenberg College 1 Illinois Wesleyan, 1 Dortmund, 1 Carleton, 1 SMU

17 CEU posters at DNP Meetings 4 REU students

Faculty summer visitors:Rusty Towell, Don Isenhower,Brett Fadem

UIUC students in grad school:

Chang Lee, Case WesternMax Candocia, UIUCAndrew McCormick, HarvardNick Muchia, NorthwesternTyler Natoli, U. of ChicagoAaron Veicht, ColumbiaSung Ho Yoon, MITEmiliy Zarndt, Indiana

Amahd, Zarah - SMUBassett, Dan - UIUCBayse, Austin - ACUBurnap, Alexander – UIUCCandocia, Max - UIUCDeinlein, George – UIUCEbertle, Louisa - CarletonGoldberg, Leah - Illinois WesleyanIde, Justine - MuhlenbergJohnson, Paul - UIUCJumper, Daniel - ACUKim, Hye Ryong - UIUCKim, Yongsun - UIUCKish, Jay - ACULee, Chang - UIUCLichtenwalner, Phil - Muhlenberg

McCormick, Andrew - UIUCMucia, Nicholas - UIUCNatoli, Tyler - UIUCRao, Gaurav - UIUCSimpsong, Jessica - UIUCSparks, Nathan - ACUStrack, Jason - UIUCTech, Sebastian - DortmundTranchica, Zach - UIUCVeicht, Aaron - UIUCWatts, Cole - ACUWood, John - ACUWright, Ryan - ACUYoon Sungho - UIUCZarndt, Emily - UIUC

January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

2005 – 2011 working on theNSF MRI for the PHENIX Muon Trigger

5 January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

Matthias Perdekamp

Cameron McKinney

John Blackburn

UIUC PHENIX-Spin & Belle Group 2011-2014

Scott WolinPh.D. 2013Systems EngineerNorthrup Gruman

Francesca Giordano

Martin LeitgabPh.D. 2013Senior Research EngineerLockheed Martin / NASA

Daniel Jumper

JhnJea Choi

PedroMontuenga

6 January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

AL-W Analysis for Runs 2012 and 2013

Maximum Likelihood Method based on signal- and background-distributions for 9 tracking parameters – see poster by Daniel Jumper.

Francesca Giordano co-leads the PHENIXW-analysis for the muon spectrometer arms.

Final analysis push at PHENIX Spin Fest 2014,July 11th – August 8th with 25 participants + lecturers.

7 January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

Spin Symposium Beijing, October 2014, Francesca Giordano, UIUC for PHENIX

DSSV: projected impact of new 2013 STAR and PHENIX data

with projected W-data

DS

SV

fro

m “

Th

e R

HIC

Sp

in P

rog

ram

”A

sch

en

au

er

et

al.

arX

ic:1

50

1.0

12

20

8 January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

Spin Symposium Beijing, October 2014, Francesca Giordano, UIUC for PHENIX

NNPDF projected impact of new data: STAR & PHENIX data might be able todetect flavor symmetry breaking forlight quark sea polarization !

NNPDF from “The RHIC Spin Program”Aschenauer et al. arXic:1501.01220

9 January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

AL(W ) Plans

NNPDF projected impact of new data: STAR & PHENIX data might be able todetect flavor symmetry breaking forlight quark sea polarization !

Publication of final results in 2015(thesis Daniel Jumper)

Francesca Giordano and Daniel Jumpercollaborate with Emanuele Nocera tointroduce muon arm AL into the NNPDF fit.

Possibly additional run in 2016 - decisionby BNl-ALD expected this month.

NNPDF from “The RHIC Spin Program”Aschenauer et al. arXic:1501.01220

10 January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

(II) Spin Physics with the MPC AN for π0 at √s=62.4 GeV and 3.1 < η < 3.8

Phys. Rev. D90 (2014)012006 – Thesis John Koster, UIUC

MPC North PbWO4 with APD readout.MPC built at UIUC with NSF funding.

AN of similar magnitude from √s=19.4 GeV at FNAL to √s=200 GeV at RHIC

11 January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

(II) Spin Physics with the MPCAN for EMC Cluster at √s=200 GeV, 3.1 < η < 3.8

Phys. Rev. D90 (2014)012006 – Thesis John Koster, UIUC

AN does not fall of as 1/pT as expected at leading order twist.

In the OPE the AN

leading order twist

Sub-leading order twist

12 January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

Fit to pT dependence of AN for EMC Clusters

Thesis John Koster, UIUC + discussion with Zhangbo Kang

The pT dependence of AN can be fit with a form that AN re-summedto higher order twist might take

In the OPE the AN

add two first terms

13 January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

(II) Spin Physics with the MPCALL for Clusters at √s=500 GeV, Run 2009

Thesis Scott Wolin, UIUC: First MPC ALL Relative luminosity corrections, δR/R=2.4 x 10-4 from 1.2 x 10-3

ALL ~ 0, for ∫Ldt=10pb-1 from run 2009. ∫Ldt=270pb-1 in run 2013 !

MPC Cluster ALL MPC Cluster Decomposition

14 January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

Status of Δg(x) and Importance of MPC ALL

Truncated Integrals with Uncertainties

The uncertainty on ∫Δg(x)dx for 0.001<x<0.05Is about 0.5 - as large as the proton spin!This is exactly the MPC acceptance !!

De Florian, Sassot, Stratmann, VogelsangEvidence for Gluon Polarization in the ProtonPhys.Rev.Lett. 113 (2014) 012001

15 January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

The Impact of a Run 2013 MPC ALLDSSV from “The RHIC Spin Program”Aschenauer et al. arXic:1501.01220

Includes also 2015 STARjet measurements

Projected ALL in the MPC for run 2013Compared to present DSSV withDSSV uncertainty

16 January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

Towards a MPC ALL Measurement for Run 2013

FEE upgrade to improve triggering for run 2013: Scott Wolin (Thesis: MPC ALL run 2009, relative luminosity)

Develop waveform fitting algorithm for new FEM (see poster): Pedro Montuenga (Thesis: MPC ALL run 2013, suppression of non-photonicbackground based on waveform algorithms)

Reduce systematic uncertainty from relative luminosity from over δR/R~1 x 10-3 to less than δR/R < 0.5x10-4 (see poster)SW & Cameron McKinney (Thesis: Physics simulations, MPC ALL run 11, relative luminosity)

Future Plans: 2015 Publish ALL run 11 & improved δR/R Complete calibrations + relative luminosity analysis for run 13 2016 Publish ALL run 13

CGC test:Presence of dense gluon field in the Au nucleus leads to multiple scattering and parton can distribute its energy to many scattering centers “Mono-jet signature”. D. Kharzeev, E. Levin, L. McLerran, Nucl.Phys.A748:627-640,2005

pT is balanced by many gluons

dilute parton system, deuteron dense gluon

field , Au

(III) Nuclear Effects in dAu at RHIC and pPb at LHC: Gluon Saturation at High Parton Densities at Small

January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

Probing for Saturation Effects in Hadron-Hadron Correlations in d+Au with the Forward MPC

Experimental signature:(I)Broadening in the correlation of back-to-back jets or hadrons

(II)Suppression of away-side jets or hadrons

January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

MPC integrated in thepiston of the muonspectrometer magnet.

The MPC is an NSF fundedUIUC built forward EMC basedon PbWO4 Crystals with APD readout.

backtobackcollision-N-N

backtoback /~

pp

dAudA N

NNJ

Peripheral d-Au collisions

Central d-Au collisions

Away Side hadrons/jets in central d-Ausuppressed by factor 5 at x~0.0005Mono-jets !? CGC ?

Beau Meredith (thesis), Phys.Rev.Lett. 107 (2011) 172301

Probing for Saturation Effects in Hadron-Hadron Correlations in d+Au with the Forward MPC

Experimental signature:(I)Broadening in the correlation of back-to-back jets or hadrons

(II)Suppression of away-side jets or hadrons

January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

MPC integrated in thepiston of the muonspectrometer magnet.

The MPC is an NSF fundedUIUC built forward EMC basedon PbWO4 Crystals with APD readout.

backtobackcollision-N-N

backtoback /~

pp

dAudA N

NNJ

Peripheral d-Au collisions

Central d-Au collisions

Away Side hadrons/jets in central d-Ausuppressed by factor 5 at x~0.0005Mono-jets !? CGC ?

Beau Meredith (thesis), Phys.Rev.Lett. 107 (2011) 172301

Z. Kang, I. Vitev, H. Xing arXiv:1112.6021pQCD + ISR, FSR, cold nuclear matter effects

20 January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

Continue Search for Saturation in pPb at ATLAS

ATLAS pp: differential Drell-Yan Cross SectionJHEP 1406 (2014) 112

Electron & muon results combinedXmin ~ 0.0003, 26 GeV < mll < 66 GeV

o Use run 1 p-Pb data set to measure Drell-Yan cross section for |η|< 2.4 at √s=5 TeV and determine RpA(DY). Reference can be taken from NNLO.

o DY probes initial state in nucleus free of possible final state effects. Synergy with existing DY expertise at UIUC & important input for interpretation of Pb-Pb results.

Possible future extension:

(1)Use jet-photon events to study for possible jet modifications and to reach lower x.

(2)Use jet-jet events to extend the analysis to |η|< 4.9 and reach the lowest x possible

21

Physics - Analysis - Instrumentation: Overall Plan for PHENIX, Belle, ATLAS Activities 2015-17

January 12th PHENIX pp, dA, ATLAS pA, Belle FFs

→ Daniel Jumpers’ poster

→ Francesca Giordano’s talk

→ Cameron McKinney’s and Pedro Montunega’sposters

(D. Jumper, F. Giordano)

(F. Giordano )

(C. McKinney, P. Montunega)

(whole group + NPL techs)

(I. Choi, undergraduate RAs)

→ IhnJea Choi’s poster

(Y. Kulinich)

Perdekamp will be on sabbatical in Fall 2015to allow presence atCERN and at BNL.