From acp548 at uregina.ca Tue Dec 2 15:25:12 2025 From: acp548 at uregina.ca (Alicia Postuma) Date: Tue, 2 Dec 2025 20:25:12 +0000 Subject: [Kaon-LT] [EXTERNAL] Fw: arXiv New submission -> 2512.01928 in nucl-ex from acp548@uregina.ca In-Reply-To: <202512020254.5B22sGX4228873@lib-arxiv-033.serverfarm.cornell.edu> References: <202512020254.5B22sGX4228873@lib-arxiv-033.serverfarm.cornell.edu> Message-ID: Dear Colleagues, Please find below the information for the KaonLT pi+ BSA paper now posted on the arXiv. Cheers, Alicia ________________________________ From: e-prints at arxiv.org Sent: December 1, 2025 8:54 PM To: Alicia Postuma Subject: arXiv New submission -> 2512.01928 in nucl-ex from acp548 at uregina.ca Your submission submit/7006450 has been assigned the permanent arXiv identifier 2512.01928 and is available at: https://urldefense.proofpoint.com/v2/url?u=http-3A__arxiv.org_abs_2512.01928&d=DwIFAw&c=CJqEzB1piLOyyvZjb8YUQw&r=YtQMiwW7spOwhRsHGV2LDYtPiNvAO4j1mNjikf5Ejik&m=7U6pNP3ylOJeEahG0RiQyw2L8zaWO85-1NsxjAtDnbtYHHBtkb4WHD0mhAhhPTWm&s=bfHuQ7VtEajLk46Jc9SgPhDnlHRWu-sKFD6IojXlpRk&e= The paper password for this article is: rw7rd Please share this with your co-authors. They may use it to claim ownership. Abstract will appear in today's mailing as: ------------------------------------------------------------------------------ \\ arXiv:2512.01928 From: Alicia Postuma Date: Mon, 1 Dec 2025 17:44:36 GMT (1126kb) Title: Probing hard/soft factorization via beam-spin asymmetry in exclusive pion electroproduction from the proton Authors: Alicia C. Postuma (1), Garth M. Huber (1), D.J. Gaskell (2), N. Heinrich (1), T. Horn (3 and 2), M. Junaid (1), S.J.D. Kay (1 and 4), V. Kumar (1), P. Markowitz (5), J. Roche (6), R. Trotta (3), A. Usman (1), B.-G. Yu (7), T.K. Choi (8), K.-J. Kong (7), S. Ali (3), R. Ambrose (1), D. Androic (9), W. Armstrong (10 and 11), A. Bandari (12), V. Berdnikov (3), H. Bhatt (13), D. Bhetuwal (13), D. Biswas (14), M. Boer (10), P. Bosted (12), E. Brash (15), A. Camsonne (2), J.P. Chen (2), J. Chen (12), M. Chen (16), M.E. Christy (14), S. Covrig (2), M. M. Dalton (2), W. Deconinck (17), M. Diefenthaler (2), B. Duran (10), D. Dutta (13), M. Elaasar (18), R. Ent (2), H. Fenker (2), E. Fuchey (19), D. Hamilton (20), J.-O. Hansen (2), F. Hauenstein (21), S. Jia (10), M.K. Jones (2), S. Joosten (11), M.L. Kabir (13), A. Karki (13), C. Keppel (2), E. Kinney (22), N. Lashley-Colthirst (14), W.B. Li (12 and 23), D. Mack (2), S. Malace (2), M. McCaughan (2), Z.E. Meziani (11 and 10), R. Michaels (2), R. Montgomery (20), M. Muhoza (3), C. Munoz Camacho (24), G. Niculescu (25), I. Niculescu (25), Z. Papandreou (1), S. Park (23), E. Pooser (2), M. Rehfuss (10), B. Sawatzky (2), G.R. Smith (2), H. Szumila-Vance (2), A. Teymurazyan (1), H. Voskanyan (26), B. Wojtsekhowski (2), S.A. Wood (2), Z. Ye (11), C. Yero (5), J. Zhang (16), X. Zheng (16) ((1) University of Regina, (2) Thomas Jefferson National Accelerator Facility, (3) Catholic University of America, (4) University of York, (5) Florida International University, (6) Ohio University, (7) Korea Aerospace University, (8) Yonsei University, (9) University of Zagreb, (10) Temple University, (11) Argonne National Laboratory, (12) College of William and Mary, (13) Mississippi State University, (14) Hampton University, (15) Christopher Newport University, (16) University of Virginia, (17) University of Manitoba, (18) Southern University at New Orleans, (19) University of Connecticut, (20) University of Glasgow, (21) Old Dominion University, (22) University of Colorado Boulder, (23) Stony Brook University, (24) University Paris-Saclay, (25) James Madison University, (26) Yerevan Physics Institute) Categories: nucl-ex hep-ex hep-ph Comments: 9 pages, 7 figures, 2 tables (main text) plus 3 pages, 6 figures, 1 table (supplemental material / appendices) License: https://urldefense.proofpoint.com/v2/url?u=http-3A__creativecommons.org_licenses_by-2Dnc-2Dnd_4.0_&d=DwIFAw&c=CJqEzB1piLOyyvZjb8YUQw&r=YtQMiwW7spOwhRsHGV2LDYtPiNvAO4j1mNjikf5Ejik&m=7U6pNP3ylOJeEahG0RiQyw2L8zaWO85-1NsxjAtDnbtYHHBtkb4WHD0mhAhhPTWm&s=ik9zq_vAn3MhDy4fpM-7VTg0X9C5u-EoTGLUJgM7CPY&e= \\ Deep exclusive meson production (DEMP) reactions, such as $p(\vec{e},e'\pi^+)n$, provide opportunities to study the three-dimensional structure of the nucleon through differential cross section and beam- and target-spin asymmetry measurements. This work aims to probe the onset of the hard/soft factorization regime through the exclusive $p(\vec{e},e'\pi^+)n$ reaction, as measured in the KaonLT experiment at Jefferson Lab Hall C. A 10.6 GeV longitudinally polarized electron beam was incident on an unpolarized liquid hydrogen target, and the scattered electron and produced meson were detected in two magnetic focusing spectrometers, enabling precision cross section measurements. The cross section ratio $\sigma_{LT'}/\sigma_0$ was extracted from the beam-spin asymmetry $A_{LU}$. The $t$-dependence of $\sigma_{LT'}/\sigma_0$ was determined at fixed $Q^2$ and $x_B$ over a range of kinematics from $22$ GeV). Furthermore, these data are combined with recent results from CLAS/CLAS12 to determine the $Q^2$-dependence of $\sigma_{LT'}/\sigma_0$ at two ($x_B$, $t$) settings. This was fairly flat, with $Q^2$ not having a measurable effect on the value of $\sigma_{LT'}/\sigma_0$ in the range explored. Results are compared to predictions from the generalized parton distribution (GPD) formalism, which relies explicitly on hard/soft factorization, and Regge formalism. The Regge models better predict $\sigma_{LT'}/\sigma_0$, which suggests that the factorization regime is not yet reached. \\ Contains: 00README.json: 219 bytes asym_q2p1.pdf: 87624 bytes asym_q3w2.pdf: 87411 bytes asym_q3w3.pdf: 87406 bytes asym_q4p4.pdf: 48483 bytes asym_q5p5.pdf: 48313 bytes elsarticle.cls: 44541 bytes fig1_phi.png: 48312 bytes fig2_gpdregge.png: 34551 bytes fig3_coinmx.pdf: 72869 bytes fig4_phasespace.png: 46013 bytes fig5_asym.pdf: 73132 bytes fig6_sigLTp.pdf: 73135 bytes fig7_q2scan.pdf: 23320 bytes kaonlt-bsa.tex: 52413 bytes klt-asym.bbl: 11492 bytes suppl.tex: 6621 bytes tphi-polar.png: 452300 bytes -------------- next part -------------- An HTML attachment was scrubbed... URL: From acp548 at uregina.ca Thu Dec 4 10:54:18 2025 From: acp548 at uregina.ca (Alicia Postuma) Date: Thu, 4 Dec 2025 15:54:18 +0000 Subject: [Kaon-LT] [EXTERNAL] Fw: arXiv New submission -> 2512.01928 in nucl-ex from acp548@uregina.ca In-Reply-To: <202512020254.5B22sGX4228873@lib-arxiv-033.serverfarm.cornell.edu> References: <202512020254.5B22sGX4228873@lib-arxiv-033.serverfarm.cornell.edu> Message-ID: Dear Colleagues, Please find below the information for the KaonLT pi+ BSA paper now posted on the arXiv. Cheers, Alicia ________________________________ From: e-prints at arxiv.org Sent: December 1, 2025 8:54 PM To: Alicia Postuma Subject: arXiv New submission -> 2512.01928 in nucl-ex from acp548 at uregina.ca Your submission submit/7006450 has been assigned the permanent arXiv identifier 2512.01928 and is available at: https://urldefense.proofpoint.com/v2/url?u=http-3A__arxiv.org_abs_2512.01928&d=DwIFAw&c=CJqEzB1piLOyyvZjb8YUQw&r=YtQMiwW7spOwhRsHGV2LDYtPiNvAO4j1mNjikf5Ejik&m=2-Se5HMCVywo8fJDbZ-lp9DpJaCjt0pO2PIbecuuSfXQsjyr0rjFTDuG9skMxnHm&s=cqs6gpVHZ2KLsBh5eVXXf8iACKMWduE-ONY9ONeNjlo&e= The paper password for this article is: rw7rd Please share this with your co-authors. They may use it to claim ownership. Abstract will appear in today's mailing as: ------------------------------------------------------------------------------ \\ arXiv:2512.01928 From: Alicia Postuma Date: Mon, 1 Dec 2025 17:44:36 GMT (1126kb) Title: Probing hard/soft factorization via beam-spin asymmetry in exclusive pion electroproduction from the proton Authors: Alicia C. Postuma (1), Garth M. Huber (1), D.J. Gaskell (2), N. Heinrich (1), T. Horn (3 and 2), M. Junaid (1), S.J.D. Kay (1 and 4), V. Kumar (1), P. Markowitz (5), J. Roche (6), R. Trotta (3), A. Usman (1), B.-G. Yu (7), T.K. Choi (8), K.-J. Kong (7), S. Ali (3), R. Ambrose (1), D. Androic (9), W. Armstrong (10 and 11), A. Bandari (12), V. Berdnikov (3), H. Bhatt (13), D. Bhetuwal (13), D. Biswas (14), M. Boer (10), P. Bosted (12), E. Brash (15), A. Camsonne (2), J.P. Chen (2), J. Chen (12), M. Chen (16), M.E. Christy (14), S. Covrig (2), M. M. Dalton (2), W. Deconinck (17), M. Diefenthaler (2), B. Duran (10), D. Dutta (13), M. Elaasar (18), R. Ent (2), H. Fenker (2), E. Fuchey (19), D. Hamilton (20), J.-O. Hansen (2), F. Hauenstein (21), S. Jia (10), M.K. Jones (2), S. Joosten (11), M.L. Kabir (13), A. Karki (13), C. Keppel (2), E. Kinney (22), N. Lashley-Colthirst (14), W.B. Li (12 and 23), D. Mack (2), S. Malace (2), M. McCaughan (2), Z.E. Meziani (11 and 10), R. Michaels (2), R. Montgomery (20), M. Muhoza (3), C. Munoz Camacho (24), G. Niculescu (25), I. Niculescu (25), Z. Papandreou (1), S. Park (23), E. Pooser (2), M. Rehfuss (10), B. Sawatzky (2), G.R. Smith (2), H. Szumila-Vance (2), A. Teymurazyan (1), H. Voskanyan (26), B. Wojtsekhowski (2), S.A. Wood (2), Z. Ye (11), C. Yero (5), J. Zhang (16), X. Zheng (16) ((1) University of Regina, (2) Thomas Jefferson National Accelerator Facility, (3) Catholic University of America, (4) University of York, (5) Florida International University, (6) Ohio University, (7) Korea Aerospace University, (8) Yonsei University, (9) University of Zagreb, (10) Temple University, (11) Argonne National Laboratory, (12) College of William and Mary, (13) Mississippi State University, (14) Hampton University, (15) Christopher Newport University, (16) University of Virginia, (17) University of Manitoba, (18) Southern University at New Orleans, (19) University of Connecticut, (20) University of Glasgow, (21) Old Dominion University, (22) University of Colorado Boulder, (23) Stony Brook University, (24) University Paris-Saclay, (25) James Madison University, (26) Yerevan Physics Institute) Categories: nucl-ex hep-ex hep-ph Comments: 9 pages, 7 figures, 2 tables (main text) plus 3 pages, 6 figures, 1 table (supplemental material / appendices) License: https://urldefense.proofpoint.com/v2/url?u=http-3A__creativecommons.org_licenses_by-2Dnc-2Dnd_4.0_&d=DwIFAw&c=CJqEzB1piLOyyvZjb8YUQw&r=YtQMiwW7spOwhRsHGV2LDYtPiNvAO4j1mNjikf5Ejik&m=2-Se5HMCVywo8fJDbZ-lp9DpJaCjt0pO2PIbecuuSfXQsjyr0rjFTDuG9skMxnHm&s=dq_VLNxZaP2Z7zx7L9HoslnmzVyUrT_4MbQInwvQ6Gw&e= \\ Deep exclusive meson production (DEMP) reactions, such as $p(\vec{e},e'\pi^+)n$, provide opportunities to study the three-dimensional structure of the nucleon through differential cross section and beam- and target-spin asymmetry measurements. This work aims to probe the onset of the hard/soft factorization regime through the exclusive $p(\vec{e},e'\pi^+)n$ reaction, as measured in the KaonLT experiment at Jefferson Lab Hall C. A 10.6 GeV longitudinally polarized electron beam was incident on an unpolarized liquid hydrogen target, and the scattered electron and produced meson were detected in two magnetic focusing spectrometers, enabling precision cross section measurements. The cross section ratio $\sigma_{LT'}/\sigma_0$ was extracted from the beam-spin asymmetry $A_{LU}$. The $t$-dependence of $\sigma_{LT'}/\sigma_0$ was determined at fixed $Q^2$ and $x_B$ over a range of kinematics from $22$ GeV). Furthermore, these data are combined with recent results from CLAS/CLAS12 to determine the $Q^2$-dependence of $\sigma_{LT'}/\sigma_0$ at two ($x_B$, $t$) settings. This was fairly flat, with $Q^2$ not having a measurable effect on the value of $\sigma_{LT'}/\sigma_0$ in the range explored. Results are compared to predictions from the generalized parton distribution (GPD) formalism, which relies explicitly on hard/soft factorization, and Regge formalism. The Regge models better predict $\sigma_{LT'}/\sigma_0$, which suggests that the factorization regime is not yet reached. \\ Contains: 00README.json: 219 bytes asym_q2p1.pdf: 87624 bytes asym_q3w2.pdf: 87411 bytes asym_q3w3.pdf: 87406 bytes asym_q4p4.pdf: 48483 bytes asym_q5p5.pdf: 48313 bytes elsarticle.cls: 44541 bytes fig1_phi.png: 48312 bytes fig2_gpdregge.png: 34551 bytes fig3_coinmx.pdf: 72869 bytes fig4_phasespace.png: 46013 bytes fig5_asym.pdf: 73132 bytes fig6_sigLTp.pdf: 73135 bytes fig7_q2scan.pdf: 23320 bytes kaonlt-bsa.tex: 52413 bytes klt-asym.bbl: 11492 bytes suppl.tex: 6621 bytes tphi-polar.png: 452300 bytes -------------- next part -------------- An HTML attachment was scrubbed... URL: From acp548 at uregina.ca Thu Dec 4 11:01:37 2025 From: acp548 at uregina.ca (Alicia Postuma) Date: Thu, 4 Dec 2025 16:01:37 +0000 Subject: [Kaon-LT] [EXTERNAL] Fw: Your Submission PLB-D-25-00443R3 In-Reply-To: <010f019ae4972365-f0ff24e0-38a6-40c2-87e2-ddb601fc83d7-000000@us-east-2.amazonses.com> References: <010f019ae4972365-f0ff24e0-38a6-40c2-87e2-ddb601fc83d7-000000@us-east-2.amazonses.com> Message-ID: Dear Colleagues, I am pleased to inform you that our paper on the pi+ BSA paper from the KaonLT experiment has been accepted for publication in Physics Letters B. My thanks to everyone who provided feedback on the manuscript during the review process. Cheers, Alicia ________________________________ From: em.plb.82b7.97da57.ff3266d3 at editorialmanager.com on behalf of Haiyan Gao Sent: December 3, 2025 8:21 AM To: Alicia Postuma Subject: Your Submission PLB-D-25-00443R3 Ms. Ref. No.: PLB-D-25-00443R3 Title: Probing hard/soft factorization via beam-spin asymmetry in exclusive pion electroproduction from the proton Physics Letters B PLB-D-25-00443R3 Dear Ms. Alicia Postuma, I am pleased to confirm that your paper "Probing hard/soft factorization via beam-spin asymmetry in exclusive pion electroproduction from the proton" has been accepted for publication in Physics Letters B. Comments from the Editor and Reviewers can be found below. Thank you for submitting your work to this journal. We encourage authors of original research papers to share the research objects ? including raw data, methods, protocols, software, hardware and other outputs ? associated with their paper. More information on how our open access Research Elements journals can help you do this is available at https://urldefense.proofpoint.com/v2/url?u=https-3A__www.elsevier.com_authors_tools-2Dand-2Dresources_research-2Delements-2Djournals-3Fdgcid-3Dec-5Fem-5Fresearch-5Felements-5Femail&d=DwIF-g&c=CJqEzB1piLOyyvZjb8YUQw&r=YtQMiwW7spOwhRsHGV2LDYtPiNvAO4j1mNjikf5Ejik&m=-lwqQDX79lB3nGFHO4CsDYTH2cXZbJCU_RyWk754W0l-tWWN2_126wTgBVk35PR2&s=Xbmf0w9wX3t2N-HC2C_MtVtBSuzM05f1VGf7Vul2RQ4&e= . With kind regards, Haiyan Gao Editor Physics Letters B Comments from the Editors and Reviewers: As author/reviewer for Physics Letters B we would like to inform you that Elsevier has joined the SCOAP3 initiative, and therefore Phys. Lett. B is fully Open Access without author fee. 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