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We present the first extraction of the transversity distribution in the framework of collinear factorization based on the global analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets and in…

High Energy Physics - Phenomenology · Physics 2018-05-23 Marco Radici , Alessandro Bacchetta

The transversity distribution was recently extracted from deep-inelastic scattering processes producing hadron pairs in the final state. Together with a specific chiral-odd di-hadron fragmentation function, it is involved in the elementary…

High Energy Physics - Phenomenology · Physics 2016-11-11 Marco Radici

We present the first extraction of the transversity distribution based on the global analysis of pion-pair production in deep-inelastic scattering and in proton-proton collisions with one transversely polarized proton. The extraction relies…

High Energy Physics - Phenomenology · Physics 2018-10-02 Marco Radici

We summarize the latest achievements about the extraction of the transversity parton distribution and proton tensor charge based on an analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets.…

High Energy Physics - Phenomenology · Physics 2015-06-17 Marco Radici , Alessandro Bacchetta , A. Courtoy

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…

High Energy Physics - Phenomenology · Physics 2015-06-23 Marco Radici , A. Courtoy , Alessandro Bacchetta

We present 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…

High Energy Physics - Phenomenology · Physics 2015-03-23 Marco Radici , A. Courtoy , Alessandro Bacchetta , Marco Guagnelli

We present first observations of the transversity parton distribution based on an analysis of pion-pair production in deep inelastic scattering off transversely polarized targets. The extraction of transversity relies on the knowledge of…

High Energy Physics - Phenomenology · Physics 2011-10-27 Alessandro Bacchetta , A. Courtoy , Marco Radici

Observations of the transversity parton distribution based on an analysis of pion-pair production in deep inelastic scattering off transversely polarized targets are presented. This extraction relies on the knowledge of dihadron…

High Energy Physics - Phenomenology · Physics 2011-06-30 A. Courtoy , Alessandro Bacchetta , Marco Radici

We consider the azimuthal correlations of charged hadron pairs with large total transverse momentum and small relative momentum, produced in proton-proton collisions with one transversely polarized proton. One of these correlations directly…

High Energy Physics - Phenomenology · Physics 2016-08-10 Marco Radici , Alessandro M. Ricci , Alessandro Bacchetta , Asmita Mukherjee

We have updated our 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. The most recent COMPASS data…

High Energy Physics - Phenomenology · Physics 2015-10-13 Marco Radici

We present an extraction of the valence transversity parton distributions based on an analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets. Recently released data for proton and deuteron targets…

High Energy Physics - Phenomenology · Physics 2015-06-12 Alessandro Bacchetta , A. Courtoy , Marco Radici

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…

High Energy Physics - Phenomenology · Physics 2012-06-11 A. Courtoy , Alessandro Bacchetta , Marco Radici

A model for dihadron fragmentation functions is briefly outlined, that describes the fragmentation of a quark in two unpolarized hadrons. The parameters are tuned to the output of the PYTHIA event generator for two-hadron semi-inclusive…

High Energy Physics - Phenomenology · Physics 2008-11-26 Marco Radici

In these proceedings, we propose an extraction of the valence transversity parton distributions. Based on an analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets, this extraction of transversity…

High Energy Physics - Phenomenology · Physics 2013-06-28 A. Courtoy , Alessandro Bacchetta , Marco Radici

We give a brief overview on some of the latest results on the transversity function. We focus on some recent extractions from azimuthal asymmetries data measured in semi-inclusive deep-inelastic scattering processes, and on the impact of…

High Energy Physics - Phenomenology · Physics 2024-09-30 Carlo Flore

The azimuthal asymmetry of heavy quarks production on double polarized proton-proton and proton-antiproton colliders are studied in this work at next-to-leading order in $\alpha_s$, with some details included. The purpose is to see whether…

High Energy Physics - Phenomenology · Physics 2020-05-20 G. P. Zhang

In recent years information on the transversity distribution $h_1$ has been obtained combining the Collins asymmetry results from semi-inclusive deep inelastic scattering (SIDIS) data on transversely polarized nucleon targets with the…

High Energy Physics - Phenomenology · Physics 2019-06-12 V. Barone , F. Bradamante , A. Bressan , A. Kerbizi , A. Martin , A. Moretti , J. Matousek , G. Sbrizzai

The fragmentation of a colored parton directly into a pair of colorless hadrons is a non-perturbative mechanism that offers important insights into the nucleon structure. Di-hadron fragmentation functions can be extracted from…

High Energy Physics - Phenomenology · Physics 2016-07-20 Silvia Pisano , Marco Radici

In the fragmentation of a transversely polarized quark several left-right asymmetries are possible for the hadrons in the jet. When only one unpolarized hadron is selected, it exhibits an azimuthal modulation known as Collins effect. When a…

High Energy Physics - Experiment · Physics 2015-12-23 Compass Collaboration , C. Adolph , R. Akhunzyanov , M. G. Alexeev , G. D. Alexeev , A. Amoroso , V. Andrieux , V. Anosov , W. Augustyniak , A. Austregesilo , C. D. R. Azevedo , B. Badelek , F. Balestra , J. Barth , R. Beck , Y. Bedfer , J. Bernhard , K. Bicker , E. R. Bielert , R. Birsa , J. Bisplinghoff , M. Bodlak , M. Boer , P. Bordalo , F. Bradamante , C. Braun , A. Bressan , M. Büchele , E. Burtin , W. -C. Chang , M. Chiosso , I. Choi , S. U. Chung , A. Cicuttin , M. L. Crespo , Q. Curiel , N. d'Hose , S. Dalla Torre , S. S. Dasgupta , S. Dasgupta , O. Yu. Denisov , L. Dhara , S. V. Donskov , N. Doshita , V. Duic , M. Dziewiecki , A. Efremov , C. Elia , P. D. Eversheim , W. Eyrich , A. Ferrero , M. Finger , M. Finger , H. Fischer , C. Franco , N. du Fresne von Hohenesche , J. M. Friedrich , V. Frolov , E. Fuchey , F. Gautheron , O. P. Gavrichtchouk , S. Gerassimov , F. Giordano , I. Gnesi , M. Gorzellik , S. Grabmüller , A. Grasso , M. Grosse-Perdekamp , B. Grube , T. Grussenmeyer , A. Guskov , F. Haas , D. Hahne , D. von Harrach , R. Hashimoto , F. H. Heinsius , F. Herrmann , F. Hinterberger , N. Horikawa , C. -Yu Hsieh , S. Huber , S. Ishimoto , A. Ivanov , Yu. Ivanshin , T. Iwata , R. Jahn , V. Jary , P. Jörg , R. Joosten , E. Kabuß , B. Ketzer , G. V. Khaustov , Yu. A. Khokhlov , Yu. Kisselev , F. Klein , K. Klimaszewski , J. H. Koivuniemi , V. N. Kolosov , K. Kondo , K. Königsmann , I. Konorov , V. F. Konstantinov , A. M. Kotzinian , O. Kouznetsov , M. Krämer , P. Kremser , F. Krinner , Z. V. Kroumchtein , N. Kuchinski , F. Kunne , K. Kurek , R. P. Kurjata , A. A. Lednev , A. Lehmann , M. Levillain , S. Levorato , J. Lichtenstadt , R. Longo , A. Maggiora , A. Magnon , N. Makins , N. Makke , G. K. Mallot , C. Marchand , B. Marianski , A. Martin , J. Marzec , J. Matousek , H. Matsuda , T. Matsuda , G. Meshcheryakov , W. Meyer , T. Michigami , Yu. V. Mikhailov , Y. Miyachi , P. Montuenga , A. Nagaytsev , F. Nerling , D. Neyret , V. I. Nikolaenko , J. Novy , W. -D. Nowak , G. Nukazuka , A. S. Nunes , A. G. Olshevsky , I. Orlov , M. Ostrick , D. Panzieri , B. Parsamyan , S. Paul , J. -C. Peng , F. Pereira , G. Pesaro , M. Pesek , D. V. Peshekhonov , S. Platchkov , J. Pochodzalla , V. A. Polyakov , J. Pretz , M. Quaresma , C. Quintans , S. Ramos , C. Regali , G. Reicherz , C. Riedl , N. S. Rossiyskaya , D. I. Ryabchikov , A. Rychter , V. D. Samoylenko , A. Sandacz , C. Santos , S. Sarkar , I. A. Savin , G. Sbrizzai , P. Schiavon , K. Schmidt , H. Schmieden , K. Schönning , S. Schopferer , A. Selyunin , O. Yu. Shevchenko , L. Silva , L. Sinha , S. Sirtl , M. Slunecka , F. Sozzi , A. Srnka , M. Stolarski , M. Sulc , H. Suzuki , A. Szabelski , T. Szameitat , P. Sznajder , S. Takekawa , J. ter Wolbeek , S. Tessaro , F. Tessarotto , F. Thibaud , F. Tosello , V. Tskhay , S. Uhl , J. Veloso , M. Virius , T. Weisrock , M. Wilfert , K. Zaremba , M. Zavertyaev , E. Zemlyanichkina , M. Ziembicki , A. Zink

We present an updated study of the Collins azimuthal asymmetries for pion-in-jet production in polarized $pp$ collisions. To this aim, we employ a recent extraction of the transversity and Collins fragmentation functions from semi-inclusive…

High Energy Physics - Phenomenology · Physics 2025-11-27 Umberto D'Alesio , Carlo Flore , Marco Zaccheddu
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