Hiroyuki Kawamura (RIKEN) QCD Prediction of A TT for small Q T dimuon production in pp and ppbar collisions Hiroyuki Kawamura (RIKEN) Jiro Kodaira (KEK)

Slides:

Advertisements

Similar presentations

Mauro Anselmino, Como, September 7, 2005 Transversity Transversity (transverse spin and transverse motion) Towards transversity distributions: theory.

Advertisements

December 17, 2004 JLab Hall A Upgrade 1 Semi-Inclusive DIS --opportunities at JLab upgrade Feng Yuan RBRC, Brookhaven National Laboratory.

Soft gluon resummation in transversely polarized Drell-Yan process at small transverse momentum NPB777 (07) 203 and more double-spin asymmetries and novel.

Dilepton production near partonic threshold in transversely polarized p\bar{p} scatterings H. Shimizu (Hiroshima U, KEK) G. Sterman (SUNY) W. Vogelsang.

偏極核子・反核子衝突における小横運動量ドレル・ヤン過程 arXiv: [hep-ph] ― ＱＣＤの摂動高次項の影響と核子の transversity 分布 ― 田中和廣 ( 順天堂大 ) 川村浩之 ( 理研 ) 小平治郎 (KEK)

Mauro Anselmino, Prague, August 1, 2005 Hadron Structure and Hadron Spectroscopy Transversity (transverse spin and transverse motion) Transversity distributions.

Constraining the polarized gluon PDF in polarized pp collisions at RHIC Frank Ellinghaus University of Colorado (for the PHENIX and STAR Collaborations)

Resummation of Large Logs in DIS at x->1 Xiangdong Ji University of Maryland SCET workshop, University of Arizona, March 2-4, 2006.

Mar. 17, 2006 Imran Younus Probing Gluon Polarization with Longitudinally Polarized p+p Collisions at  s = 200 GeV.

Working group C summary Hadronic final states theory Mrinal Dasgupta.

QCD Resummations for Hadronic Collisions Werner Vogelsang RBRC and BNL Nuclear Theory RHIC/AGS Users’ Meeting 2005.

9/19/20151 Semi-inclusive DIS: factorization Feng Yuan Lawrence Berkeley National Laboratory RBRC, Brookhaven National Laboratory.

Zhongbo Kang Los Alamos National Laboratory Transverse single spin asymmetry of the W production at RHIC RHIC-AGS Annual Users’ Meeting 2015 June 9-12,

1 Threshold Resummation Effects in polarized DY at GSI and J-PARC EPOCHAL Tsukuba, Tsukuba, JAPAN, 4/20-24(2006) Ref. H.Shimizu, G.Sterman, W.Vogelsang,

Hiroyuki Kawamura (RIKEN) QCD Prediction of A TT for Small Q T Dimuon Production in pp and ppbar Collisions Hiroyuki Kawamura (RIKEN) Jiro Kodaira (KEK)

J/ψ Production in pPb Collisions at the LHC Zhang, Hong-Fei Third Military Medical University.

Quark Helicity Distribution at large-x Collaborators: H. Avakian, S. Brodsky, A. Deur, arXiv: [hep-ph] Feng Yuan Lawrence Berkeley National Laboratory.

High-Energy QCD Spin Physics Xiangdong Ji Maryland Center for Fundamental Physics University of Maryland DIS 2008, April 7, 2008, London.

QCD hard scattering at J-PARC Marco Stratmann July 8 th, 2008.

6/1/20161 TMD Evolution Feng Yuan Lawrence Berkeley National Laboratory.

May 18-20, 2005 SIR05 JLab 1 P ? Dependence of SSA -- from nonpert. to pert. Feng Yuan, RBRC, Brookhaven National Laboratory References: Ji, Ma, Yuan,

11/5/20151 Energy Evolution of Sivers asymmetry in Hard Processes Feng Yuan Lawrence Berkeley National Laboratory.

Zhongbo Kang Los Alamos National Laboratory QCD structure of the nucleon and spin physics Lecture 5 & 6: TMD factorization and phenomenology HUGS 2015,

1 Cross Sections and Spin Asymmetries in Hadronic Collisions Jianwei Qiu Brookhaven National Laboratory KEK theory center workshop on high-energy hadron.

PANIC05 M. Liu1 Probing the Gluon Polarization with A LL of J/  at RHIC Ming X. Liu Los Alamos National Lab (PHENIX Collaboration)

Transverse Momentum Resummation for Higgs Production at Hadron Colliders Chong Sheng Li School of Physics, Peking University 2012 海峡两岸粒子物理与宇宙学研讨会 ,

1 Transversity and inclusive 2-pion production Marco Radici Pavia TJNAF, May 2005 In collaboration with: A. Bacchetta (Univ. Regensburg)

11/28/20151 QCD resummation in Higgs Boson Plus Jet Production Feng Yuan Lawrence Berkeley National Laboratory Ref: Peng Sun, C.-P. Yuan, Feng Yuan, PRL.

Study of Direct Photon Pair Production in Hadronic Collisions at √s=14 TeV (Preliminary Results) Sushil Singh Chauhan Department of Physics & Astrophysics.

June 25, 2004 Jianwei Qiu, ISU 1 Introduction to Heavy Quark Production Jianwei Qiu Iowa State University CTEQ Summer School on QCD Analysis and Phenomenology.

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,

JPARC DY Workshop, April 7 Ralf Seidl (RBRC) R.Seidl: Transverse Spin 1RIKEN, April 7 In JPARC Drell Yan accessible with: UU(unpolarized beam, unpolarized.

Hiroyuki Kawamura (RIKEN) QCD prediction for the dimuon Q T spectrum in transversely polarized Drell-Yan process Hiroyuki Kawamura (RIKEN) Dec. 1, 2005.

Single-Spin Asymmetry in pp  X at RHIC Werner Vogelsang BNL Nuclear Theory RSC meeting, RIKEN, 09/29/2006.

1 Quarkonium Production at J-PARC Quarkonium Production at J-PARC with Unpolarized Proton Beam Quarkonium Production at J-PARC with Polarized Beam and.

April 20-24, 2006 DIS Soft Gluon Ressumation in Effective Field Theory Feng Yuan, RBRC, Brookhaven National Laboratory References: Ildibi, Ji, Yuan,

Spin and k ┴ dependent parton distributions Mauro Anselmino, ECT* Trento, 04/07/ a closer look at the nucleon structure -  integrated partonic distributions.

Hiroyuki Kawamura (RIKEN) Transverse double-spin asymmetries for small Q T Drell-Yan pair production in pp and ppbar collisions Hiroyuki Kawamura (RIKEN)

Hiroyuki Kawamura (RIKEN) Soft-gluon resummation in Drell-Yan dilepton (and vector boson) production at small transverse momentum: spin asymmetries and.

Perturbative QCD in Nuclear Environment Jianwei Qiu Iowa State University Student Lecture at Quark Matter 2004 Oakland – January 11, 2004 Table of Contents:

6/28/20161 Future Challenges of Spin Physics Feng Yuan Lawrence Berkeley National Laboratory.

October 12, 2004 SPIN-2004, Trieste Spin Transfers in Polarized Hadronic Collisions (RHIC-Spin in mind) V. L. Rykov and K. Sudoh RIKEN.

A T : novel variable to study low transverse momentum vector boson production at hadron colliders. Rosa María Durán Delgado The University of Manchester.

11/19/20161 Transverse Momentum Dependent Factorization Feng Yuan Lawrence Berkeley National Laboratory RBRC, Brookhaven National Laboratory.

Transversity (transverse spin and transverse motion)

RBRC & BNL Nuclear Theory

Single-Transverse Spin Asymmetries in Hadronic Scattering

Measurements of ΔG Focus on COMPASS data ΔG from scaling violations

Lecture 2 Evolution and resummation

Villa Olmo (Como), 7−10th. September 2005

Physics with polarized antiprotons at GSI-PAX

Spin Physics at RHIC Towards Precision QCD Physics, KEK, March 10, 2007 Naohito SAITO (KEK)

Semi-inclusive DIS at Small-x

March 16, meeting Y. Koike (BNL/Niigata Univ.)

JSA/HUGS Fellowship Seminar-2016

Can We Learn Quark Orbital Motion from SSAs?

Unique Description for SSAs in DIS and Hadronic Collisions

RBRC and BNL Nuclear Theory

Yuji Koike (Niigata Univ.)

Measuring the sea polarization by Drell-Yan production

Deeply Virtual Neutrino Scattering at Leading Twist

Unique Description for Single Transverse Spin Asymmetries

Jiro Kodaira and QCD Analysis of Structure Functions

Probing hadron structure from hard processes

A prediction of unintegrated parton distribution

Measurements of ΔG Focus on COMPASS data ΔG from scaling violations

Unifying the Mechanisms for SSAs in Hard Process

QT resummation in transversely polarized Drell-Yan process

Spin Studies via Drell-Yan Process at PANDA

6th European Research Conference September 21-24, Milos, Greece

Presentation transcript:

Hiroyuki Kawamura (RIKEN) QCD Prediction of A TT for small Q T dimuon production in pp and ppbar collisions Hiroyuki Kawamura (RIKEN) Jiro Kodaira (KEK) Kazuhiro Tanaka (Juntendo Univ.) 2006 Sep. 29 RSC2006 in RIKEN

Hiroyuki Kawamura (RIKEN) Jiro Kodaira ( ) Bj. sum rule anomaly in g1 twist-3 operators in g2 J/ψ production at RHIC etc. Special session on Wednesday in Kyoto Spin Physics

Hiroyuki Kawamura (RIKEN) Transeversly polarized DY process  Transversity : δq(x) — twist-2 pdf ♠ Spin dependent part tDY : no fragmentation function Ralston & Soper ‘79 at RHIC, J-PARC, GSI, …

Hiroyuki Kawamura (RIKEN)  Double spin asymmetry : A TT in tDY Q T spectrum of dimuon — small at RHIC : PP collider Martin,Shäfer,Stratmann,Vogelsang (’99) — can be very large at GSI : PP-bar collider Barone, Cafarella, Coriano, Guzzi, Ratcliffe (‘05)  More information from Q T spectrum of dimuon → We calculated spin dep. part of Q T distribution at O(α ｓ ) ♣ fixed order result : incorrect at small Q T → Q T resummation― recoil logs Shimizu, Sterman, Yokoya, Vogelsang (’05) (calculation in D-dim. : cumbersome due to φ dependence)

Hiroyuki Kawamura (RIKEN) Q T resummation Next-to-leading logarithmic (NLL) resummation in tDY : Collins, Soper ’81 Collins, Soper, Sterman ‘85 b : impact parameter H.K, Kodaira, Shimizu, Tanaka ‘06  universal Sudakov factor Catani et al. ‘01 coeff. function Kodaira, Trentadue ‘81

Hiroyuki Kawamura (RIKEN) finite at Q T = 0

Hiroyuki Kawamura (RIKEN) contour deformation 1. b-integration — integration in complex b plane b bLbL C1C1 C2C2 Kulesza, Sterman,Vogelsang ’02 reproduce the fixed order results order by order  Prescription for extremely large b-region Landau pole : 2. Non-perturbative effects Gaussian : “intrinsic k T ” More on resummation

Hiroyuki Kawamura (RIKEN) remove unphysical singularity at b = 0 expS(b,Q) = 1 at b=0 Bozzi, Catani, De Florian, Grazzini, ’05 normalization  Small b-region NLL resummation + LO without double counting : “NLL+LO” — uniform accuracy in the entire Q_T region  Matching

Hiroyuki Kawamura (RIKEN) Numerical study δq(x) − a model saturating Soffer bound at  INPUT : transversity — GRV98 — GRSV01 + NLO DGLAP evolution Hayashigaki, Kanawzawa, Koike ’97 Kumano,Miyama ’97 Vogelsang ’98 Martin,Shäfer,Stratmann,Vogelsang (’99)

Hiroyuki Kawamura (RIKEN) g NP = 0.3, 0.5, 0.8GeV 2 pp RHIC  s = 200 GeV, Q = 8 GeV, y=2, φ=0 Q T spectrum ↔ = 0.7, 0.9, 1.1 GeV pol. unpol.

Hiroyuki Kawamura (RIKEN) Double spin asymmetry pp RHIC  s = 200 GeV, Q = 8 GeV, y=2, φ=0 A TT : 6% in small Q T region g NP dependences cancel flat in small Q T region larger A TT for larger Q y dependence is small Q=15GeV Q= 8GeV Q= 3GeV Q= 5GeV Q = GeV, y = 0,1,2 g NP = 0.3, 0.5, 0.8GeV 2 g NP = 0.5GeV 2 suppressed at small x (due to evolution)

Hiroyuki Kawamura (RIKEN) Double spin asymmetry pp J-PARC A TT  15% ↔ pdf at large x  s = 10 GeV, Q = 2,3,4 GeV, y=0, φ=0  s = 10 GeV, Q = 2,3,4 GeV, y=0.5, φ=0 A TT  15-20%

Hiroyuki Kawamura (RIKEN) Double spin asymmetry A TT can be 30% ↔ valence polarization large x very small g NP dependence ppbar  s = 14.5 GeV, Q = 2-6 GeV, y = 0, 0.5, 1,φ=0 Q=2GeV Q=3GeV Q=4GeV Q=6GeV

Hiroyuki Kawamura (RIKEN) Summary  We calculated Q T spectrum of dimuon in tDY at O(α s ) in MS-bar scheme.  Soft gluon effects are included by all order resummation — NLL Q T resummation + LO → complete “NLL + LO” formula → uniform accuracy over entire range of Q T (corrections are down by α s )  Double-spin asymmetry with transversity δq(x) satisfying Soffer inequality. — not sensitive to NP function (“intrinsic k T ”) — flat in small Q T region — small y dependence — large in low energy ppbar 15 ~ 30% (large-x, valence pdf )