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Joint Institute for Nuclear Research XIII Advanced Research Workshop on High Energy Spin <strong>Physics</strong> (DSPIN-09) Dubna, September 1–5, 2009 Proceedings Edited by A.V. Efremov and S.V. Goloskokov Dubna 2010
Page 1: XIII Advanced Research Workshop on
Page 5 and 6: Contents Welcome address A. Sissaki
Page 7 and 8: Probing the hadron structure with p
Page 9: A study of polarized metastable hel
Page 12 and 13: JAN PAWE̷L NASSALSKI 1944 - 2009 A
Page 14 and 15: HARD COLLISIONS OF SPINNING PROTONS
Page 16 and 17: to try to polarize the protons in t
Page 18 and 19: 1983, but was later reborn as RHIC,
Page 20 and 21: few 10 −5 over the PPT’s 3 cm d
Page 22 and 23: Figure 8: Inclusive pion asymmetry
Page 25: THEORY OF SPIN PHYSICS
Page 28 and 29: quarks from the target B have an ad
Page 30 and 31: 0.4 0.2 0 -0.2 P N A 1 =32, A 2 =32
Page 32 and 33: ✬✩ T ✫✪ 0(tree) ❅ 0 �
Page 34 and 35: The main contribution originates fr
Page 36 and 37: qN ≡ q−1 is a ”quark propagat
Page 38 and 39: 3 A simplified multiperipheral quar
Page 40 and 41: 3.2 Evolution of the polarization o
Page 42 and 43: a jet-handedness asymmetry, generat
Page 44 and 45: For bag models [1], the proportiona
Page 46 and 47: 1.5 1.0 0.5 qv �1.0 �0.5 0.5 1.
Page 48 and 49: Schematically the cross sections fo
Page 50 and 51: 4 (Du − Dd) K+ +K − from e + e
Page 52 and 53:
is a priori sensitive to chiral-odd
Page 54 and 55:
good way to reach information on th
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α eff s = αs(μ 2 )+ 1 � � ar
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ASYMMETRIES AT THE ILC ENERGIES AND
Page 60 and 61:
In the studied models, we set a Z
Page 62 and 63:
ON THE q ¯q-GLUEBALL-MIXED 0 ++ -M
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where all values are in MeV . We de
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POLARIZATION AT PHOTON COLLIDER. US
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osons. It is expected that this int
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of photons). This polarization depe
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To calculate GPDs, we use the CTEQ6
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GPDs contribute to the production a
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Let us now consider the proton matr
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here that in contrast to the pQCD t
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terms of universal near-forward con
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Using the small (m 2 q/E 2 )-approx
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TRANSVERSITY IN EXCLUSIVE MESON ELE
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observable dominant amplitudes low
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sin (φ- φ S ) (π + ) A UT 1.0 0.
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lepton-nucleon scattering. It turne
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[18] H. W. Huang, R. Jakob, P. Krol
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Tyy = (1 − β2 )[β2 (1 + sin 2
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4. Summary 1. The theoretical inves
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This expression can further be arra
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ANALYTIC PERTURBATION THEORY AND PR
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account their RG evolution. As a re
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TRANSVERSE MOMENTUM DEPENDENT PARTO
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0.4 0.3 0.2 0.1 g (1)u 1T 0 0 0.25
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0 -0.002 -0.004 -0.006 -0.008 A sin
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COLOUR MODIFICATION OF FACTORISATIO
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A ↑ (PA) B(PB) a X b d X c h(Ph)
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The various possibilities are: dσ
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The final expression coincides with
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4 Summary and Conclusions Viewing t
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IMPACT PARAMETER REPRESENTATION AND
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gravitomagnetic transverse density
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POLARIZED PARTON DISTRIBUTIONS FROM
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Table 2: Estimations of the uncerta
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POLARIZED PDFs: REMARKS ON METHODS
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and higher twist [4] corrections to
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symmetric value of a8) and almost i
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ing should be appropriate. We also
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Experimental details depend on the
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2 Evolution equations for truncated
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contributions to the spin of nucleo
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dependence (TMD) and this might be
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Concerning the strange quark and an
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Gj(y) are the unpolarized valon dis
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[7]. Newly released data from HERME
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where Rμ = ∂μ � G a ρν ˜ G
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[4] M.A. Shifman, A.I. Vainshtein a
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pion field. Pions themselves are th
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the matter during intermediate, tra
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to discriminate the spin-2 graviton
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Acknowledgments We would like to th
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Now, using some input distributions
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w1 + w2 = 1 � 2 pT cos 2 m + p0 2
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[7] P. Zavada, Phys. Rev. D 65, 005
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SEARCH FOR NARROW PION-PROTON STATE
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internal target is shown in fig. 2.
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MEASUREMENT OF TENSOR POLARIZATION
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over the distance of ∼ 28 m betwe
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PROSPECTS OF MEASURING ZZ AND WZ PO
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ρ00 correspond to transverse left-
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LATEST RESULTS ON DEEPLY VIRTUAL CO
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3 Exclusive DVCS Events The HERMES
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cos 0φ LU,I A sin φ ALU,I sin 2φ
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POLARIZATION TRANSFER MECHANISM AS
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Suggestion of the experiments for m
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PROBING THE HADRON STRUCTURE WITH P
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cussed at the SPSC Meeting at Villa
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xΔ N (1) fu (x) 0.05 0.04 0.03 0.0
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Facility Type s (GeV 2 ) Timeline R
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POLARIZATION OF VALENCE, NON-STRANG
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helicity distributions Δq in the f
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Figure 4: Left: Polarized valence q
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shown in Fig. 6. The parametrizatio
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NEW MONTE-CARLO GENERATOR OF POLARI
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MN 0.06 0.04 0.02 0 -0.02 -0.04 -0.
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HIGH ENERGY SPIN PHYSICS WITH THE P
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magnetic calorimeter (EMCal). Indiv
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Figure 3: Left : ALL for π0 at √
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Figure 5: ALL for h + versus pT mea
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MEASUREMENTS OF THE Ayy, Axx, Axz A
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Typical momentum spectrum for the 1
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OVERVIEW OF RECENT HERMES RESULTS V
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A 2 0.3 0.25 0.2 0.15 0.1 0.05 0 -0
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tries in the two Q 2 regions are fu
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Strange quark distributions. The st
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NLO QCD PREDICTIONS FOR GLUON POLAR
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that NLO QCD corrections can be fac
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NLO Phase Space is simulated correc
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STUDY OF LIGHT NUCLEI SPIN STRUCTUR
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polarization observables are not so
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EXCLUSIVE ELECTROPRODUCTION OF ρ 0
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subtracted using simulated events g
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Re(T 01 /T 00 ) 0.4 0.2 0 HERMES pr
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Table 1: Leading-twist transverse m
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3.3 Single spin asymmetry with a tr
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5 Conclusions Transverse Momentum D
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The asymmetry Ameas N (φ) was calc
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agreement with the previous PROZA d
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Acknowledgement The work was suppor
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from the underlying theory. Higher-
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particularly sensitive to the least
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) 2 (GeV 2 Q DVCS measurements in H
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Figure 2: Compilation of the world
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¯Λ polarization was consistent wi
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Table 1: Status of the DY experimen
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tracking material. With a pitch of
Page 273 and 274:
has ∼20 times larger acceptance t
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References [1] R.D. Klem et al., Ph
Page 277 and 278:
The second condition is the status
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A N , % 0 -25 -50 -75 0 0.5 1 2 -t,
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Table 1: The estimated yields NEV o
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References [1] A. Gaidot et al., Ph
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The data from the former two experi
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charged particles to traverse on th
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[4] M. Dugger, et al. (The CLAS Col
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the polarimetry at the energies bet
Page 293 and 294:
(a) (b) Figure 5: (a) the correlati
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1.1 Nucleon Helicity Structure at l
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15 ND3 for polarized deuterons and
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The 4th order Heavy Baryon Chiral P
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MEASUREMENTS OF GEp/GMp TO HIGH Q 2
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2 Recoil Polarization Method With a
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(a) (b) Figure 3: (a) Selection of
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5 Results of GEp-2γ Experiment So
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the light-front nucleonic wave func
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Figure 10: The test of the modified
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[3] V. Punjabi et al. Phys. Rev. C
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LONGITUDINAL SPIN TRANSFER TO Λ AN
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MB sample were reconstructed in the
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LL D LL D 0.4 0.2 0 -0.2 0.2 0 -0.2
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LONGITUDINAL SPIN TRANSFER OF THE
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LL D 1 0.5 0 -0.5 -1 -1.5 NOMAD HER
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THE GPD PROGRAM AT COMPASS A. Sanda
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COMPASS offers the advantage to pro
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The transverse target pin asymmetri
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are about -0.02, in agreement with
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AZIMUTHAL ASYMMETRIES IN PRODUCTION
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So, the aim of this study is to see
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Dependence of the AA fit parameters
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• the amplitudes asin φ (x, z, p
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quark in an unpolarized hadron. The
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dN/dφ h 8000 6000 4000 2000 0 Azim
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scattering plane [12]. The hadron y
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Coll p A 0.1 0 -0.1 positive hadron
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DELTA-SIGMA EXPERIMENT - THE RESULT
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charge-exchange quasi-elastic diffe
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COMPASS RESULTS ON GLUON POLARISATI
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and ΔG G (xav corr A2h LL (xBj)+A
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The remarkable agreement of the MC
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7 Results The preliminary measureme
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STATUS OF THE PAX EXPERIMENT Erhard
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Figure 2: Using events from elastic
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Figure 6: Target section required f
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ASYMMETRY MEASUREMENTS IN THE ELAST
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P 1 0.8 0.6 0.4 0.2 -0 -0.2 -0.4 -0
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CHARGE ASYMMETRY AND SYMMETRY PROPE
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These model independent statements
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The measured value of the asymmetry
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a term which depends on the maximum
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FIRST MEASUREMENT OF THE INTERFEREN
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pair yields [9]. The di-hadron frag
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projection on the thrust axis. All
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sign change of the IFF can therefor
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References Table 3: Integrated asym
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TECHNICS and NEW DEVELOPMENTS
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2 H-Jet Polarimeter The polarized h
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(and polarization) along axis X:
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AN vs. p for leading neutron T N A
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DEVELOPMENT OF HIGH ENERGY DEUTERON
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ADC, channels 800 600 400 200 100 2
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SPIN-ISOTOPIC ANALYSIS AT SUPERLOW
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3. Squeezing of quadrupole spectra.
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TRANSPARENT SPIN RESONANCE CROSSING
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2 The spin motion description under
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4 Examples of transparent crossing
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DEUTERON BEAM POLARIMETRY AT THE IN
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error bars include both statistical
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SPIN-MANIPULATING POLARIZED DEUTERO
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Several techniques [9] are used to
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A STUDY OF POLARIZED METASTABLE HEL
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The Schroedinger equation is writte
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PROTON POLARIMETER AT 200 MEV ENERG
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P (θ) σ (θ) =sinθ cos θ 2� b
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SPIN-ORBIT POTENTIALS IN NEUTRON-RI
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Figure 2: The differential cross se
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SPIN CONTROL BY RF FIELDS AT ACCELE
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precession in a ”field” h = ɛ
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Till now, RF spin flip has been stu
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RELATED PROBLEMS
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a potential V (r) interpolating bet
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forms on the edge of bubble a close
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where P = 1 D × B is the Poynting
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The action with the approximate sol
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in the four-dimensional and general
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It is clear that the self-adjoint o
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or Equation (1) may then be written
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References [1] S. Weinberg, Gravita
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a describes acceleration of the obs
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the results obtained in the present
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the polarized valence quark and sea
Page 464 and 465:
with a special emphasis on the extr
Page 466 and 467:
longitudinal spin transfer in Λ an
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List of participants of DSPIN-09 Na
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