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Our son, Timothy Hayward, is finally ready to complete his PHD from The College of William & Mary in Theoretical Nuclear Physics. Here is the cover page and 1st paragraph. Note that HIS name is first on the list of collaborators from around the world & he is the youngest of the lot. . We are beyond proud of this young man!! Ghost. ( Father of Son of Ghost.)
Observation of Beam Spin Asymmetries in the Process ep → e 0π +π −X with CLAS12 T.B.
Hayward,1 C. Dilks,2 A. Vossen,2 S. Adhikari,3 G. Angelini,4 H. Atac,5 C. Ayerbe Gayoso,1 N.A. Baltzell,6 L. Barion,7 M. Battaglieri,6, 8 I. Bedlinskiy,9 Fatiha Benmokhtar,10 A. Bianconi,11, 12 A.S. Biselli,13 F. Boss`u,14 S. Boiarinov,6 W.J. Briscoe,4 D. Bulumulla,15 V.D. Burkert,6 D.S. Carman,6 J.C. Carvajal,3 A. Celentano,8 P. Chatagnon,16 T. Chetry,17, 18 G. Ciullo,7, 19 B.A. Clary,20 P.L. Cole,21 M. Contalbrigo,7 G. Costantini,11 V. Crede,22 A. D’Angelo,23, 24 N. Dashyan,25 R. De Vita,8 M. Defurne,14 A. Deur,6 S. Diehl,26, 20 C. Djalali,18 R. Dupre,16 M. Ehrhart,27, 16 A. El Alaoui,28 L. El Fassi,17 L. Elouadrhiri,6 S. Fegan,29 A. Filippi,30 T.A. Forest,31 G. Gavalian,6 G.P. Gilfoyle,32 F.X. Girod,6 D.I. Glazier,33 A.A. Golubenko,34 R.W. Gothe,35 Y. Gotra,6 K. Griffioen,1 M. Guidal,16 K. Hafidi,27 H. Hakobyan,28, 25 M. Hattawy,15 K. Hicks,18 A. Hobart,16 M. Holtrop,36 D.G. Ireland,33 E.L. Isupov,34 H.S. Jo,37 K. Joo,20 S. Joosten,27, 5 D. Keller,38 M. Khachatryan,15 A. Khanal,3 A. Kim,20 W. Kim,37 A. Kripko,26 V. Kubarovsky,6 S.E. Kuhn,15 L. Lanza,23 M. Leali,11, 12 S. Lee,39 P. Lenisa,7, 19 K. Livingston,33 I .J .D. MacGregor,33 D. Marchand,16 N. Markov,6, 20 L. Marsicano,8 V. Mascagna,40, 12, ∗ B. McKinnon,33 Z.E. Meziani,27, 5 M. Mirazita,41 V. Mokeev,6 A Movsisyan,7 C. Munoz Camacho,16 P. Nadel-Turonski,6 P. Naidoo,33 K. Neupane,35 G. Niculescu,42 T. R. O’Connell,20 M. Osipenko,8 M. Paolone,43, 5 L.L. Pappalardo,7, 19 R. Paremuzyan,6, 36 E. Pasyuk,6 O. Pogorelko,9 Y. Prok,15 B.A. Raue,3, 6 M. Ripani,8 J. Ritman,44 A. Rizzo,23, 24 P. Rossi,6 J. Rowley,18 F. Sabati´e,14 C. Salgado,45 E.P. Segarra,39 Y.G. Sharabian,6 U. Shrestha,18 O. Soto,41, 28 N. Sparveris,5 S. Stepanyan,6 I.I. Strakovsky,4 S. Strauch,35 A. Thornton,33 N. Tyler,35 R. Tyson,33 M. Ungaro,6 L. Venturelli,11, 12 H. Voskanyan,25 E. Voutier,16 Kevin Wei,20 X. Wei,6 B. Yale,1 N. Zachariou,29 and J. Zhang38
(The CLAS Collaboration) 1College of William and Mary, Williamsburg, Virginia 23187-8795
2Duke University, Durham, North Carolina 27708-0305 3Florida International University, Miami, Florida 33199 4The George Washington University, Washington, DC 20052 5Temple University, Philadelphia, PA 19122 6Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 7 INFN, Sezione di Ferrara, 44100 Ferrara, Italy 8 INFN, Sezione di Genova, 16146 Genova, Italy 9National Research Centre Kurchatov Institute - ITEP, Moscow, 117259, Russia 10Duquesne University, 600 Forbes Avenue, Pittsburgh, PA 15282 11Universit`a degli Studi di Brescia, 25123 Brescia, Italy 12INFN, Sezione di Pavia, 27100 Pavia, Italy 13Fairfield University, Fairfield CT 06824 14IRFU, CEA, Universit´e Paris-Saclay, F-91191 Gif-sur-Yvette, France 15Old Dominion University, Norfolk, Virginia 23529 16Universit’e Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France 17Mississippi State University, Mississippi State, MS 39762-5167 18Ohio University, Athens, Ohio 45701 19Universita’ di Ferrara , 44121 Ferrara, Italy 20University of Connecticut, Storrs, Connecticut 06269 21Lamar University, 4400 MLK Blvd, PO Box 10046, Beaumont, Texas 77710 22Florida State University, Tallahassee, Florida 32306 23INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy 24Universita’ di Roma Tor Vergata, 00133 Rome Italy 25Yerevan Physics Institute, 375036 Yerevan, Armenia 26II Physikalisches Institut der Universitaet Giessen, 35392 Giessen, Germany 27Argonne National Laboratory, Argonne, Illinois 60439 28Universidad T´ecnica Federico Santa Mar´ıa, Casilla 110-V Valpara´ıso, Chile 29University of York, York YO10 5DD, United Kingdom 30INFN, Sezione di Torino, 10125 Torino, Italy 31Idaho State University, Pocatello, Idaho 83209 32University of Richmond, Richmond, Virginia 23173 33University of Glasgow, Glasgow G12 8QQ, United Kingdom 34Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia 35University of South Carolina, Columbia, South Carolina 29208 36University of New Hampshire, Durham, New Hampshire 03824-3568 37Kyungpook National University, Daegu 41566, Republic of Korea 2 38University of Virginia, Charlottesville, Virginia 22901 39Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307 40Universit`a degli Studi dell’Insubria, 22100 Como, Italy 41INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy 42James Madison University, Harrisonburg, Virginia 22807 43New Mexico State University, PO Box 30001, Las Cruces, NM 88003, USA 44Institute fur Kernphysik (Juelich), Juelich, Germany 45Norfolk State University, Norfolk, Virginia 23504
(Dated: January 5, 2021) Our son writes.....
The observation of beam spin asymmetries in two-pion production in semi-inclusive deep inelastic scattering off an unpolarized proton target is reported for the first time. The data presented here were taken in the fall of 2018 with the CLAS12 spectrometer using a 10.6 GeV longitudinally spin polarized electron beam delivered by CEBAF at JLab. The measured asymmetries provide the first observation of a signal that can be used to extract the PDF e(x) in a collinear framework and the helicity-dependent two-pion fragmentation function G ⊥ 1 .
Keywords: dihadron; beam spin asymmetry; SIDIS; CLAS12; twist-3 PDF; dihadron fragmentation function Protons and neutrons constitute most of the visible matter of the universe, however our understanding of how some of their most important properties, such as mass and spin, emerge from the strong interactions of the constituent quarks and gluons is still incomplete.
Therefore, the study of the internal dynamics of the nucleon is fundamental to our understanding of the theory of strong interactions and, by extension, our understanding of the nature of matter itself.
There are eight more pages of stuff we cant comprehend. lol. But it LOOKS great!
Observation of Beam Spin Asymmetries in the Process ep → e 0π +π −X with CLAS12 T.B.
Hayward,1 C. Dilks,2 A. Vossen,2 S. Adhikari,3 G. Angelini,4 H. Atac,5 C. Ayerbe Gayoso,1 N.A. Baltzell,6 L. Barion,7 M. Battaglieri,6, 8 I. Bedlinskiy,9 Fatiha Benmokhtar,10 A. Bianconi,11, 12 A.S. Biselli,13 F. Boss`u,14 S. Boiarinov,6 W.J. Briscoe,4 D. Bulumulla,15 V.D. Burkert,6 D.S. Carman,6 J.C. Carvajal,3 A. Celentano,8 P. Chatagnon,16 T. Chetry,17, 18 G. Ciullo,7, 19 B.A. Clary,20 P.L. Cole,21 M. Contalbrigo,7 G. Costantini,11 V. Crede,22 A. D’Angelo,23, 24 N. Dashyan,25 R. De Vita,8 M. Defurne,14 A. Deur,6 S. Diehl,26, 20 C. Djalali,18 R. Dupre,16 M. Ehrhart,27, 16 A. El Alaoui,28 L. El Fassi,17 L. Elouadrhiri,6 S. Fegan,29 A. Filippi,30 T.A. Forest,31 G. Gavalian,6 G.P. Gilfoyle,32 F.X. Girod,6 D.I. Glazier,33 A.A. Golubenko,34 R.W. Gothe,35 Y. Gotra,6 K. Griffioen,1 M. Guidal,16 K. Hafidi,27 H. Hakobyan,28, 25 M. Hattawy,15 K. Hicks,18 A. Hobart,16 M. Holtrop,36 D.G. Ireland,33 E.L. Isupov,34 H.S. Jo,37 K. Joo,20 S. Joosten,27, 5 D. Keller,38 M. Khachatryan,15 A. Khanal,3 A. Kim,20 W. Kim,37 A. Kripko,26 V. Kubarovsky,6 S.E. Kuhn,15 L. Lanza,23 M. Leali,11, 12 S. Lee,39 P. Lenisa,7, 19 K. Livingston,33 I .J .D. MacGregor,33 D. Marchand,16 N. Markov,6, 20 L. Marsicano,8 V. Mascagna,40, 12, ∗ B. McKinnon,33 Z.E. Meziani,27, 5 M. Mirazita,41 V. Mokeev,6 A Movsisyan,7 C. Munoz Camacho,16 P. Nadel-Turonski,6 P. Naidoo,33 K. Neupane,35 G. Niculescu,42 T. R. O’Connell,20 M. Osipenko,8 M. Paolone,43, 5 L.L. Pappalardo,7, 19 R. Paremuzyan,6, 36 E. Pasyuk,6 O. Pogorelko,9 Y. Prok,15 B.A. Raue,3, 6 M. Ripani,8 J. Ritman,44 A. Rizzo,23, 24 P. Rossi,6 J. Rowley,18 F. Sabati´e,14 C. Salgado,45 E.P. Segarra,39 Y.G. Sharabian,6 U. Shrestha,18 O. Soto,41, 28 N. Sparveris,5 S. Stepanyan,6 I.I. Strakovsky,4 S. Strauch,35 A. Thornton,33 N. Tyler,35 R. Tyson,33 M. Ungaro,6 L. Venturelli,11, 12 H. Voskanyan,25 E. Voutier,16 Kevin Wei,20 X. Wei,6 B. Yale,1 N. Zachariou,29 and J. Zhang38
(The CLAS Collaboration) 1College of William and Mary, Williamsburg, Virginia 23187-8795
2Duke University, Durham, North Carolina 27708-0305 3Florida International University, Miami, Florida 33199 4The George Washington University, Washington, DC 20052 5Temple University, Philadelphia, PA 19122 6Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 7 INFN, Sezione di Ferrara, 44100 Ferrara, Italy 8 INFN, Sezione di Genova, 16146 Genova, Italy 9National Research Centre Kurchatov Institute - ITEP, Moscow, 117259, Russia 10Duquesne University, 600 Forbes Avenue, Pittsburgh, PA 15282 11Universit`a degli Studi di Brescia, 25123 Brescia, Italy 12INFN, Sezione di Pavia, 27100 Pavia, Italy 13Fairfield University, Fairfield CT 06824 14IRFU, CEA, Universit´e Paris-Saclay, F-91191 Gif-sur-Yvette, France 15Old Dominion University, Norfolk, Virginia 23529 16Universit’e Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France 17Mississippi State University, Mississippi State, MS 39762-5167 18Ohio University, Athens, Ohio 45701 19Universita’ di Ferrara , 44121 Ferrara, Italy 20University of Connecticut, Storrs, Connecticut 06269 21Lamar University, 4400 MLK Blvd, PO Box 10046, Beaumont, Texas 77710 22Florida State University, Tallahassee, Florida 32306 23INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy 24Universita’ di Roma Tor Vergata, 00133 Rome Italy 25Yerevan Physics Institute, 375036 Yerevan, Armenia 26II Physikalisches Institut der Universitaet Giessen, 35392 Giessen, Germany 27Argonne National Laboratory, Argonne, Illinois 60439 28Universidad T´ecnica Federico Santa Mar´ıa, Casilla 110-V Valpara´ıso, Chile 29University of York, York YO10 5DD, United Kingdom 30INFN, Sezione di Torino, 10125 Torino, Italy 31Idaho State University, Pocatello, Idaho 83209 32University of Richmond, Richmond, Virginia 23173 33University of Glasgow, Glasgow G12 8QQ, United Kingdom 34Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia 35University of South Carolina, Columbia, South Carolina 29208 36University of New Hampshire, Durham, New Hampshire 03824-3568 37Kyungpook National University, Daegu 41566, Republic of Korea 2 38University of Virginia, Charlottesville, Virginia 22901 39Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307 40Universit`a degli Studi dell’Insubria, 22100 Como, Italy 41INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy 42James Madison University, Harrisonburg, Virginia 22807 43New Mexico State University, PO Box 30001, Las Cruces, NM 88003, USA 44Institute fur Kernphysik (Juelich), Juelich, Germany 45Norfolk State University, Norfolk, Virginia 23504
(Dated: January 5, 2021) Our son writes.....
The observation of beam spin asymmetries in two-pion production in semi-inclusive deep inelastic scattering off an unpolarized proton target is reported for the first time. The data presented here were taken in the fall of 2018 with the CLAS12 spectrometer using a 10.6 GeV longitudinally spin polarized electron beam delivered by CEBAF at JLab. The measured asymmetries provide the first observation of a signal that can be used to extract the PDF e(x) in a collinear framework and the helicity-dependent two-pion fragmentation function G ⊥ 1 .
Keywords: dihadron; beam spin asymmetry; SIDIS; CLAS12; twist-3 PDF; dihadron fragmentation function Protons and neutrons constitute most of the visible matter of the universe, however our understanding of how some of their most important properties, such as mass and spin, emerge from the strong interactions of the constituent quarks and gluons is still incomplete.
Therefore, the study of the internal dynamics of the nucleon is fundamental to our understanding of the theory of strong interactions and, by extension, our understanding of the nature of matter itself.
There are eight more pages of stuff we cant comprehend. lol. But it LOOKS great!
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