A New Mechanism for Generating a Single Transverse Spin Asymmetry

Abstract

We propose a new mechanism for generating a single transverse spin asymmetry (STSA) in polarized proton-proton and proton-nucleus collisions in the high-energy scattering approximation. In this framework the STSA originates from the q->q G splitting in the projectile (proton) light-cone wave function followed by a perturbative (C-odd) odderon interaction, together with a C-even interaction, between the projectile and the target. We show that some aspects of the obtained expression for the STSA of the produced quarks are in qualitative agreement with experiment: STSA decreases with decreasing projectile x_F and is a non-monotonic function of the transverse momentum k_T. In our framework the STSA peaks at k_T near the saturation scale Q_s. Our mechanism predicts that the quark STSA in proton-nucleus collisions should be much smaller than in proton-proton collisions. We also observe that in our formalism the STSA for prompt photons is zero.

28 pages, 17 figues; v2: minor corrections, a subsection, discussion and references added; v3: minor corrections and a new figure added; v4: minor corrections; v5: minor corrections in figures

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• On the linearly polarized gluon distributions in the color dipole model
• The Odderon in Quantum Chromodynamics
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• Forward jet-like event spin-dependent properties in polarized p+p collisions at $\sqrt{s}$=200 GeV
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Cited by in corpus (58)

• Parton Fragmentation Functions
• Next-to-eikonal corrections in the CGC: gluon production and spin asymmetries in pA collisions
• Fragmentation contribution to the transverse single-spin asymmetry in proton-proton collisions
• Gluon orbital angular momentum at small-$x$
• Small-$x$ Helicity Evolution: an Operator Treatment
• Helicity Evolution at Small-x
• Single spin asymmetries from a single Wilson loop
• Transverse single spin asymmetries at small x and the anomalous magnetic moment
• Quark branching in QCD matter to any order in opacity beyond the soft gluon emission limit
• Initial state angular asymmetries in high energy p+A collisions: spontaneous breaking of rotational symmetry by a color electric field and C-odd fluctuations
• Anisotropy of the semi-classical gluon field of a large nucleus at high energy
• Single-spin asymmetries in inclusive deep inelastic scattering and multiparton correlations in the nucleon
• The elliptic gluon GTMD inside a large nucleus
• Helicity-dependent extension of the McLerran-Venugopalan model
• Quark Sivers Function at Small $x$: Spin-Dependent Odderon and the Sub-Eikonal Evolution
• Calculating TMDs of a Large Nucleus: Quasi-Classical Approximation and Quantum Evolution
• Single-Spin Asymmetries in Semi-inclusive Deep Inelastic Scattering and Drell-Yan Processes
• Extracting many-body color charge correlators in the proton from exclusive DIS at large Bjorken x
• Probing the Sivers function with an unpolarized target: GTMD distributions and the Odderons
• T-odd Leading-Twist Quark TMDs at Small $x$
• Computing the gluon Sivers function at small-$x$
• Sivers Function in the Quasi-Classical Approximation
• Valence Quark Transversity at Small $x$
• Sivers asymmetry of Drell-Yan production in small-$x$ regime
• Transverse single-spin asymmetries in $p^{\uparrow }p\to \gamma X$ from quark-gluon-quark correlations in the proton
• Analysis of the double-spin asymmetry A_LT in inelastic nucleon-nucleon collisions
• Sea quark Sivers distribution
• The spin dependent odderon in the diquark model
• Single spin asymmetry in forward $pA$ collisions II: Fragmentation contribution
• Directed flow from C-odd gluon correlations at small $x$
• Transverse single spin asymmetry in direct photon production in polarized pA collisions
• Sub-femtometer scale color charge correlations in the proton
• Single Spin Asymmetry in Forward $pA$ Collisions
• Exclusive ${\eta }_c$ production from small-$x$ evolved Odderon at a electron-ion collider
• The evolution of the small x gluon TMD
• Nuclear dependence of the transverse single-spin asymmetry in the production of charged hadrons at forward rapidity in polarized $p+p$, $p+$Al, and $p+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Transverse spin observables in hard-scattering hadronic processes within collinear factorization
• Lensing Mechanism Meets Small-$x$ Physics: Single Transverse Spin Asymmetry in $p^{\uparrow }+p$ and $p^{\uparrow }+A$ Collisions
• Comparison of transverse single-spin asymmetries for forward ${\pi }^0$ production in polarized $pp$, $p\mathrm{Al}$ and $p\mathrm{Au}$ collisions at nucleon pair c.m. energy $\sqrt{s_{\mathrm{NN}}}=200$ GeV
• Single spin asymmetry in forward $pA$ collisions: Phenomenology at RHIC
• On the process dependent nuclear $k_{\perp }$ broadening effect
• Transverse single spin asymmetry in Drell-Yan production in polarized pA collisions
• Color entanglement for $\gamma$-jet production in polarized pA collisions
• The $g_T(x)$ contribution to single spin asymmetries in SIDIS
• Cubic color charge correlator in a proton made of three quarks and a gluon
• Nuclear dependence of the transverse-single-spin asymmetry for forward neutron production in polarized $p$$+$$A$ collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Stronger $C$-odd color charge correlations in the proton at higher energy
• Probing the Gluon Sivers Function through direct photon production at RHIC
• Transverse single-spin asymmetries in proton-proton collisions at the AFTER@LHC experiment
• Single spin asymmetries in forward p-p/A collisions revisited: the role of color entanglement
• On the odderon mechanism for transverse single spin asymmetry in the Wandzura-Wilczek approximation
• On the flat transverse momentum dependence of the single-spin asymmetry in inclusive neutral pion production
• Transverse single-spin asymmetry of charged hadrons at forward and backward rapidity in polarized $p$+$p$, $p$+Al, and $p$+Au collisions at $\sqrt{s_{NN}}=200$ GeV}
• Single spin asymmetry in forward $pA$ collisions from Pomeron-Odderon interference
• Mapping the internal structure of hadrons through color and spin effects
• Single spin asymmetry in high energy QCD
• Transverse Spin and Classical Gluon Fields: Combining Two Perspectives on Hadronic Structure
• Color-glass condensate beyond the Gaussian approximation