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Interference between vector mesons electroproduced at different longitudinal coordinates leads within Glauber approximation to a $Q^2$-dependence of nuclear effects similar to what is expected to be an onset of color transparency (CT). We…

Nuclear Theory · Physics 2007-05-23 J. Huefner , B. Z. Kopeliovich

So far no theoretical tool for the comprehensive description of exclusive electroproduction of vector mesons off nuclei at medium energies has been developed. We suggest a light-cone QCD formalism which is valid at any energy and…

High Energy Physics - Phenomenology · Physics 2009-11-07 B. Z. Kopeliovich , J. Nemchik , A. Schaefer , A. V. Tarasov

The study of color transparency (CT) in elastic electroproduction of vector mesons off nuclei encounters the problem of the onset of coherence length (CL) effects. The problem of CT-CL separation arises especially at medium energies,…

High Energy Physics - Phenomenology · Physics 2008-11-26 B. Z. Kopeliovich , J. Nemchik , Ivan Schmidt

The standard first-order inelastic correction (IC) well known in the pre-QCD era, causes a rising $Q^2$-dependence of nuclear transparency in the quasielastic electron scattering, $A(e,e'p)A'$, at moderate $Q^2$, similar to what is supposed…

High Energy Physics - Phenomenology · Physics 2011-04-15 B. Z. Kopeliovich , J. Nemchik

We explore the missing momentum dependence of the CT effects in quasielastic (e,e'p) scattering. We develop the coupled-channel multiple-scattering theory (CCMST) description of final-state interaction including both the coherent and…

Nuclear Theory · Physics 2007-05-23 O. Benhar , S. Fantoni , N. N. Nikolaev , J. Speth , A. A. Usmani , B. G. Zakharov

Color transparency (CT) is an effect of suppression of nuclear shadowing of hard reactions, closely related to the color screening. A brief review of theoretical development and experimental search for CT, failed and successful, are…

High Energy Physics - Phenomenology · Physics 2007-05-23 Boris Kopeliovich

Color transparency (CT) in high momentum transfer $(e,e' \vec p)$ reactions is explored. The spin of the proton and photon are treated explicitly, hence the name ``Vector CT". The Dirac distorted wave impulse approximation is used as a…

Nuclear Theory · Physics 2007-05-23 W. R. Greenberg , G. A. Miller

CEBAF is a high-luminocity factory of virtual photons with variable virtuality $Q^{2}$ and transverse size. This makes CEBAF, in particular after the energy upgrade to (8-12)GeV, an ideal facility for uncovering new phenomena, and opening…

Nuclear Theory · Physics 2009-09-25 J. Nemchik , N. N. Nikolaev , B. G. Zakharov

Coherent electroproduction of vector mesons off $^2$H and $^4$He is considered in the kinematics of deep inelastic scattering. Special emphasis is given to the $-t\sim 0.8-1$ GeV$^2$ region where the cross section is dominated by the…

High Energy Physics - Phenomenology · Physics 2007-05-23 L. Frankfurt , V. Guzey , W. Koepf , M. Sargsian , M. Strikman

We review the current status of the phenomenon of Color Transparency (CT), a fundamental consequence of the description of hadrons from Quantum Chromo Dynamics. CT refers to the vanishing of final (and/or initial) state interactions with…

Nuclear Experiment · Physics 2025-08-20 Holly Szumila-Vance , Dipangkar Dutta , Gerald A. Miller , Misak Sargsian

We review a unique prediction of Quantum Chromo Dynamics, called color transparency (CT), where the final (and/or initial) state interactions of hadrons with the nuclear medium must vanish for exclusive processes at high momentum transfers.…

Nuclear Theory · Physics 2015-06-12 D. Dutta , K. Hafidi , M. Strikman

The color transparency (CT) of a hadron, propagating with reduced absorption in a nucleus, is a fundamental property of QCD (quantum chromodynamics) reflecting its internal structure and effective size when it is produced at high transverse…

High Energy Physics - Phenomenology · Physics 2022-06-02 Stanley J. Brodsky , Guy F. de Teramond

Nuclear transparency in the electronuclear reaction $A(e,e'K^+)$ is investigated in parallel with our previous study of pion transparency in Phys.\ Rev.\ C {\bf 111}, 064608 (2025). Based on an extended Glauber framework that incorporates…

Nuclear Theory · Physics 2026-05-07 Kook-Jin Kong , Tae Keun Choi , Byung-Geel Yu

The hard proton knock-out by the proton from the deuteron at relativistic energies is considered with a focus on the color transparency (CT) effect which influences the initial and final state interactions. The calculations are performed in…

Nuclear Theory · Physics 2023-01-31 A. B. Larionov

Within a light-cone QCD formalism which incorporates color transparency (CT), coherence length (CL) effects and gluon shadowing (GS) we study electroproduction of charmonia off nuclei. In contrast to production of light vector mesons…

High Energy Physics - Phenomenology · Physics 2009-11-07 J. Nemchik

Using the light-cone QCD dipole formalism we investigate manifestations of color transparency (CT) and coherence length (CL) effects in electroproduction of longitudinally (L) and transversally (T) polarized vector mesons. Motivated by…

High Energy Physics - Phenomenology · Physics 2008-12-18 B. Z. Kopeliovich , J. Nemchik , Ivan Schmidt

The physics observables dedicated to the study of color transparency are diverse. After a brief pedagogical introduction, we emphasize the complementarity of the nuclear filtering and color transparency concepts. The importance of quantum…

High Energy Physics - Phenomenology · Physics 2007-05-23 Bernard Pire

Within a light-cone QCD formalism based on the Green function technique incorporating color transparency, coherence length effects and gluon shadowing we study electroproduction of vector mesons off nuclei. We found rather large color…

High Energy Physics - Phenomenology · Physics 2009-11-07 J. Nemchik

We study the electroproduction of rho mesons in nuclei at intermediate energies, deriving a treatment of the energy lost by the rho in each step of multiple-scattering. This enables a close match between calculations and the experimental…

Nuclear Theory · Physics 2008-11-26 L. Frankfurt , G. A Miller , M. Strikman

Contrary to widespread opinion, color transparency (CT) brings essential ambiguity to, rather than helps in, study of the nuclear spectral function in quasielastic lepton scattering, $A(l,l'p)A'$, at high $Q^2$. Although the nuclear…

High Energy Physics - Phenomenology · Physics 2007-05-23 Boris Kopeliovich
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