References of "Courtoy, Aurore"
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See detailDefining the Observables for Quarks and Gluons Orbital Angular Momentum Distributions
Liuti, S.; Courtoy, Aurore ULg; Goldstein, G. R. et al

in Few-Body Systems (2015), 56(6-9), 325-330

We present a critical discussion of the observables that have been recently put forth to describe quarks and gluons orbital angular momentum distributions. Starting from a standard parameterization of the ... [more ▼]

We present a critical discussion of the observables that have been recently put forth to describe quarks and gluons orbital angular momentum distributions. Starting from a standard parameterization of the energy momentum tensor in QCD one can single out two forms of angular momentum, a so-called kinetic term, generally associated with the Ji decomposition, and a canonical term from the Jaffe Manohar decomposition. Orbital angular momentum has been connected to a Generalized Transverse Momentum Distribution (GTMD), for the canonical term, and to a twist three Generalized Parton Distribution for the kinetic term. We argue that while the latter appears as an azymuthal angular modulation in the longitudinal target spin asymmetry in deeply virtual Compton scattering, due to parity constraints, the GTMD associated with canonical angular momentum cannot be measured in a similar set of experiments. [less ▲]

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See detailDihadron fragmentation functions and transversity
Radici, M.; Courtoy, Aurore ULg; Bacchetta, A.

in EPJ Web of Conferences (2015), 85

We present preliminary results for an updated extraction of the transversity parton distribution based on the analysis of pion-pair production in deep-inelastic scattering off transversely polarized ... [more ▼]

We present preliminary results for an updated extraction of the transversity parton distribution based on the analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets in collinear factorization. Data for proton and deuteron targets by HERMES and COMPASS allow for a flavor separation of the valence components of transversity, while di-hadron fragmentation functions are taken from the semi-inclusive production of two pion pairs in back-to-back jets in e+e- annihilation. The latter data from Belle have been reanalyzed using the replica method and a more realistic estimate of the uncertainties on the chiral-odd interference fragmentation function has been obtained. After encoding this piece of information into the deep-inelastic scattering cross section, the transversity has been re-extracted by using the most recent and more precise COMPASS data for proton target. This picture represents the current most realistic estimate of the uncertainties on our knowledge of transversity. The preliminary results indicate that the valence up component seems smaller and with a narrower error band than in previous extraction. © 2015 Owned by the authors, published by EDP Sciences. [less ▲]

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See detailBeyond-Standard-Model Tensor Interaction and Hadron Phenomenology
Courtoy, Aurore ULg; Baeßler, Stefan; González–Alonso, Martín et al

in Physical Review Letters (2015), 115(16), 162001

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See detailImproved extraction of valence transversity distributions from inclusive dihadron production
Radici, Marco; Courtoy, Aurore ULg; Bacchetta, Alessandro et al

in Journal of High Energy Physics [=JHEP] (2015), 1505

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See detailOn the observability of the quark orbital angular momentum distribution
Courtoy, Aurore ULg; Goldstein, Gary R.; Hernandez, J. Osvaldo Gonzalez et al

in Physics Letters B (2014), 731(0), 141-147

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See detailAnalysis of $\alpha_s$ from the realization of quark-hadron duality
Courtoy, Aurore ULg; Liuti, Simonetta

in World Scientific (2013)

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See detailValence transversities: the collinear extraction
Courtoy, Aurore ULg; Bacchetta, Alessandro; Radici, Marco

in PoS - Proceedings of Science (2013)

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See detailPhenomenology of $\alpha_s$ at intermediate energy: the quark-hadron duality approach
Courtoy, Aurore ULg

in PoS - Proceedings of Science (2013)

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See detailPartonic Picture of Generalized Transverse Momentum Distributions
Liuti, Simonetta; Courtoy, Aurore ULg; Goldstein, Gary R. et al

in World Scientific (2013)

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See detailDetecting correlated di-hadron pairs: about the extraction of transversity and beyond
Radici, Marco; Bacchetta, Alessandro; Courtoy, Aurore ULg

in World Scientific (2013)

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See detailExtraction of $\alpha_s$ from deep inelastic scattering at large $x$
Courtoy, Aurore ULg; Liuti, Simonetta

in Physics Letters B (2013), B726

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See detailFirst extraction of valence transversities in a collinear framework
Bacchetta, Alessandro; Courtoy, Aurore ULg; Radici, Marco

in Journal of High Energy Physics [=JHEP] (2013), 1303

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See detailFirst extraction of interference fragmentation functions from e+e- data
Courtoy, Aurore ULg; Bacchetta, A.; Radici, M. et al

in Physical Review. D, Particles, Fields, Gravitation, and Cosmology (2012), 85(11),

We report on the first extraction of interference fragmentation functions from the semi-inclusive production of two hadron pairs in back-to-back jets in e+e- annihilation. A nonzero asymmetry in the ... [more ▼]

We report on the first extraction of interference fragmentation functions from the semi-inclusive production of two hadron pairs in back-to-back jets in e+e- annihilation. A nonzero asymmetry in the correlation of azimuthal orientations of opposite π+π- pairs is related to the transverse polarization of fragmenting quarks through a significant polarized dihadron fragmentation function. Extraction of the latter requires the knowledge of its unpolarized counterpart, the probability density for a quark to fragment in a π +π - pair. Since data for the unpolarized cross section are missing, we extract the unpolarized dihadron fragmentation function from a Monte Carlo simulation of the cross section. © 2012 American Physical Society. [less ▲]

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See detailStatus on the transversity parton distribution: the dihadron fragmentation functions way
Courtoy, Aurore ULg; Bacchetta, Alessandro; Radici, Marco

in PoS - Proceedings of Science (2012), QNP2012

We report on the extraction of dihadron fragmentation functions (DiFF) from the semiinclusive production of two hadron pairs in back-to-back jets in e+e- annihilation. A nonzero asymmetry in the ... [more ▼]

We report on the extraction of dihadron fragmentation functions (DiFF) from the semiinclusive production of two hadron pairs in back-to-back jets in e+e- annihilation. A nonzero asymmetry in the correlation of azimuthal orientations of opposite π+π− pairs is related to the transverse polarization of fragmenting quarks through a significant polarized DiFF. A combined analysis of this asymmetry and the spin asymmetry in the SIDIS process ep↑→e′(π+π−)X has led to the first extraction of the u and d-flavor transversity parton distribution function in the framework of collinear factorization. [less ▲]

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See detailThe Strong Coupling Constant from Hadron Structure Phenomenology
Courtoy, Aurore ULg; Liuti, Simonetta

in International Journal of Modern Physics Conference Series (2012)

We present recent developments on the role of the running coupling constant at the intersection of perturbative and nonperturbative QCD. A number of experiments show a smooth transition from small to ... [more ▼]

We present recent developments on the role of the running coupling constant at the intersection of perturbative and nonperturbative QCD. A number of experiments show a smooth transition from small to large scales given by the four-momentum transfer in the reactions. This is at variance with perturbative QCD where the running coupling constant becomes infinite when the scale equals ΛQCD. Approaches using an effective coupling constant could help interpret the opposite trend of data as compared to standard perturbative QCD predictions. We give an overview of the role of the coupling constant in the procedure to match nonperturbative hadronic model to perturbative QCD and we propose an extraction of an effective coupling constant from inclusive electron proton scattering data at large Bjorken x. [less ▲]

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See detailInterference Fragmentation Functions and Transverse Spin Studies.
Courtoy, Aurore ULg; Bacchetta, Alessandro; Radici, Marco

Conference (2012)

We report on the extraction of dihadron fragmentation functions (DiFF) from the semi- inclusive production of two hadron pairs in back-to-back jets in e+e− annihilation. A nonzero asymmetry in the ... [more ▼]

We report on the extraction of dihadron fragmentation functions (DiFF) from the semi- inclusive production of two hadron pairs in back-to-back jets in e+e− annihilation. A nonzero asymmetry in the correlation of azimuthal orientations of opposite π+π− pairs is related to the transverse polarization of fragmenting quarks through a significant polarized DiFF. A combined analysis of this asymmetry and the spin asymmetry in the SIDIS process ep↑ → e′(π+π−)X has led to the first extraction of the u and d-flavor transversity parton distribution function in the framework of collinear factorization. [less ▲]

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See detailDihadron fragmentation functions and their relevance for transverse spin studies
Courtoy, Aurore ULg; Bacchetta, A.; Radici, M.

in Journal of Physics: Conference Series (2011), 295(1),

Dihadron fragmentation functions describe the probability that a quark fragments into two hadrons plus other undetected hadrons. In particular, the so-called interference fragmentation functions describe ... [more ▼]

Dihadron fragmentation functions describe the probability that a quark fragments into two hadrons plus other undetected hadrons. In particular, the so-called interference fragmentation functions describe the azimuthal asymmetry of the dihadron distribution when the quark is transversely polarized. They can be used as tools to probe the quark transversity distribution in the nucleon. Recent studies on unpolarized and polarized dihadron fragmentation functions are presented, and we discuss their role in giving insights into transverse spin distributions. [less ▲]

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See detailThe Dihadron fragmentation functions way to Transversity
Courtoy, Aurore ULg; Bacchetta, Alessandro; Radici, Marco

in AIP Conference Proceedings (2011)

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See detailThe Role of the Running Coupling Constant in the Unveiling of The Hadronic Structure
Courtoy, Aurore ULg

in PoS - Proceedings of Science (2011), QCD-TNT-II

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See detailOn the Role of the Running Coupling Constant in a Quark Model Analysis of T-odd TMDs
Courtoy, Aurore ULg

in International Journal of Modern Physics Conference Series (2011), 04

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