First Measurement of Timelike Compton Scattering

P. Chatagnon; S. Niccolai; S. Stepanyan; M. J. Amaryan; G. Angelini; W. R. Armstrong; H. Atac; C. Ayerbe Gayoso; N. A. Baltzell; L. Barion; M. Bashkanov; M. Battaglieri; I. Bedlinskiy; F. Benmokhtar; A. Bianconi; L. Biondo; A. S. Biselli; M. Bondi; F. Bossù; S. Boiarinov; W. J. Briscoe; W. K. Brooks; D. Bulumulla; V. D. Burkert; D. S. Carman; J. C. Carvajal; M. Caudron; A. Celentano; T. Chetry; G. Ciullo; L. Clark; P. L. Cole; M. Contalbrigo; G. Costantini; V. Crede; A. D'Angelo; N. Dashyan; M. Defurne; R. De Vita; A. Deur; S. Diehl; C. Djalali; R. Dupré; H. Egiyan; M. Ehrhart; A. El Alaoui; L. El Fassi; L. Elouadrhiri; S. Fegan; R. Fersch; A. Filippi; G. Gavalian; Y. Ghandilyan; G. P. Gilfoyle; F. X. Girod; D. I. Glazier; A. A. Golubenko; R. W. Gothe; Y. Gotra; K. A. Griffioen; M. Guidal; L. Guo; H. Hakobyan; M. Hattawy; T. B. Hayward; D. Heddle; A. Hobart; M. Holtrop; C. E. Hyde; Y. Ilieva; D. G. Ireland; E. L. Isupov; H. S. Jo; K. Joo; M. L. Kabir; D. Keller; G. Khachatryan; A. Khanal; A. Kim; W. Kim; A. Kripko; V. Kubarovsky; S. E. Kuhn; L. Lanza; M. Leali; S. Lee; P. Lenisa; K. Livingston; I. J.D. Macgregor; D. Marchand; L. Marsicano; V. Mascagna; B. McKinnon; C. McLauchlin; S. Migliorati; M. Mirazita; V. Mokeev; R. A. Montgomery; C. Munoz Camacho; P. Nadel-Turonski; P. Naidoo; K. Neupane; T. R. O'Connell; M. Osipenko; M. Ouillon; P. Pandey; M. Paolone; L. L. Pappalardo; R. Paremuzyan; E. Pasyuk; W. Phelps; O. Pogorelko; J. Poudel; J. W. Price; Y. Prok; B. A. Raue; T. Reed; M. Ripani; A. Rizzo; P. Rossi; J. Rowley; F. Sabatié; A. Schmidt; E. P. Segarra; Y. G. Sharabian; E. V. Shirokov; U. Shrestha; D. Sokhan; O. Soto; N. Sparveris; I. I. Strakovsky; S. Strauch; N. Tyler; R. Tyson; M. Ungaro; S. Vallarino; L. Venturelli; H. Voskanyan; A. Vossen; E. Voutier; D. P. Watts; K. Wei; X. Wei; R. Wishart; B. Yale; N. Zachariou; J. Zhang; Z. W. Zhao

doi:10.1103/PhysRevLett.127.262501

First Measurement of Timelike Compton Scattering

P. Chatagnon, S. Niccolai, S. Stepanyan, M. J. Amaryan, G. Angelini, W. R. Armstrong, H. Atac, C. Ayerbe Gayoso, N. A. Baltzell, L. Barion, M. Bashkanov, M. Battaglieri, I. Bedlinskiy, F. Benmokhtar, A. Bianconi, L. Biondo, A. S. Biselli, M. Bondi, F. Bossù, S. BoiarinovW. J. Briscoe, W. K. Brooks, D. Bulumulla, V. D. Burkert, D. S. Carman, J. C. Carvajal, M. Caudron, A. Celentano, T. Chetry, G. Ciullo, L. Clark, P. L. Cole, M. Contalbrigo, G. Costantini, V. Crede, A. D'Angelo, N. Dashyan, M. Defurne, R. De Vita, A. Deur, S. Diehl, C. Djalali, R. Dupré, H. Egiyan, M. Ehrhart, A. El Alaoui, L. El Fassi, L. Elouadrhiri, S. Fegan, R. Fersch, A. Filippi, G. Gavalian, Y. Ghandilyan, G. P. Gilfoyle, F. X. Girod, D. I. Glazier, A. A. Golubenko, R. W. Gothe, Y. Gotra, K. A. Griffioen, M. Guidal, L. Guo, H. Hakobyan, M. Hattawy, T. B. Hayward, D. Heddle, A. Hobart, M. Holtrop, C. E. Hyde, Y. Ilieva, D. G. Ireland, E. L. Isupov, H. S. Jo, K. Joo, M. L. Kabir, D. Keller, G. Khachatryan, A. Khanal, A. Kim, W. Kim, A. Kripko, V. Kubarovsky, S. E. Kuhn, L. Lanza, M. Leali, S. Lee, P. Lenisa, K. Livingston, I. J.D. Macgregor, D. Marchand, L. Marsicano, V. Mascagna, B. McKinnon, C. McLauchlin, S. Migliorati, M. Mirazita, V. Mokeev, R. A. Montgomery, C. Munoz Camacho, P. Nadel-Turonski, P. Naidoo, K. Neupane, T. R. O'Connell, M. Osipenko, M. Ouillon, P. Pandey, M. Paolone, L. L. Pappalardo, R. Paremuzyan, E. Pasyuk, W. Phelps, O. Pogorelko, J. Poudel, J. W. Price, Y. Prok, B. A. Raue, T. Reed, M. Ripani, A. Rizzo, P. Rossi, J. Rowley, F. Sabatié, A. Schmidt, E. P. Segarra, Y. G. Sharabian, E. V. Shirokov, U. Shrestha, D. Sokhan, O. Soto, N. Sparveris, I. I. Strakovsky, S. Strauch, N. Tyler, R. Tyson, M. Ungaro, S. Vallarino, L. Venturelli, H. Voskanyan, A. Vossen, E. Voutier, D. P. Watts, K. Wei, X. Wei, R. Wishart, B. Yale, N. Zachariou, J. Zhang, Z. W. Zhao

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

We present the first measurement of the timelike Compton scattering process, γp→p′γ∗(γ∗→e+e-), obtained with the CLAS12 detector at Jefferson Lab. The photon beam polarization and the decay lepton angular asymmetries are reported in the range of timelike photon virtualities 2.25<Q′2<9 GeV2, squared momentum transferred 0.1<-t<0.8 GeV2, and average total center-of-mass energy squared s=14.5 GeV2. The photon beam polarization asymmetry, similar to the beam-spin asymmetry in deep virtual Compton scattering, is sensitive to the imaginary part of the Compton form factors and provides a way to test the universality of the generalized parton distributions. The angular asymmetry of the decay leptons accesses the real part of the Compton form factors and thus the D-term in the parametrization of the generalized parton distributions.

Original language	English
Article number	262501
Journal	Physical Review Letters
Volume	127
Issue number	26
DOIs	https://doi.org/10.1103/PhysRevLett.127.262501
State	Published - 24 Dec 2021

Access to Document

10.1103/PhysRevLett.127.262501

Cite this

Chatagnon, P., Niccolai, S., Stepanyan, S., Amaryan, M. J., Angelini, G., Armstrong, W. R., Atac, H., Ayerbe Gayoso, C., Baltzell, N. A., Barion, L., Bashkanov, M., Battaglieri, M., Bedlinskiy, I., Benmokhtar, F., Bianconi, A., Biondo, L., Biselli, A. S., Bondi, M., Bossù, F., ... Zhao, Z. W. (2021). First Measurement of Timelike Compton Scattering. Physical Review Letters, 127(26), Article 262501. https://doi.org/10.1103/PhysRevLett.127.262501

@article{659be3e06a9242cd8c3715c77a0dfaa7,

title = "First Measurement of Timelike Compton Scattering",

abstract = "We present the first measurement of the timelike Compton scattering process, γp→p′γ∗(γ∗→e+e-), obtained with the CLAS12 detector at Jefferson Lab. The photon beam polarization and the decay lepton angular asymmetries are reported in the range of timelike photon virtualities 2.25",

author = "P. Chatagnon and S. Niccolai and S. Stepanyan and Amaryan, {M. J.} and G. Angelini and Armstrong, {W. R.} and H. Atac and {Ayerbe Gayoso}, C. and Baltzell, {N. A.} and L. Barion and M. Bashkanov and M. Battaglieri and I. Bedlinskiy and F. Benmokhtar and A. Bianconi and L. Biondo and Biselli, {A. S.} and M. Bondi and F. Boss{\`u} and S. Boiarinov and Briscoe, {W. J.} and Brooks, {W. K.} and D. Bulumulla and Burkert, {V. D.} and Carman, {D. S.} and Carvajal, {J. C.} and M. Caudron and A. Celentano and T. Chetry and G. Ciullo and L. Clark and Cole, {P. L.} and M. Contalbrigo and G. Costantini and V. Crede and A. D'Angelo and N. Dashyan and M. Defurne and {De Vita}, R. and A. Deur and S. Diehl and C. Djalali and R. Dupr{\'e} and H. Egiyan and M. Ehrhart and {El Alaoui}, A. and {El Fassi}, L. and L. Elouadrhiri and S. Fegan and R. Fersch and A. Filippi and G. Gavalian and Y. Ghandilyan and Gilfoyle, {G. P.} and Girod, {F. X.} and Glazier, {D. I.} and Golubenko, {A. A.} and Gothe, {R. W.} and Y. Gotra and Griffioen, {K. A.} and M. Guidal and L. Guo and H. Hakobyan and M. Hattawy and Hayward, {T. B.} and D. Heddle and A. Hobart and M. Holtrop and Hyde, {C. E.} and Y. Ilieva and Ireland, {D. G.} and Isupov, {E. L.} and Jo, {H. S.} and K. Joo and Kabir, {M. L.} and D. Keller and G. Khachatryan and A. Khanal and A. Kim and W. Kim and A. Kripko and V. Kubarovsky and Kuhn, {S. E.} and L. Lanza and M. Leali and S. Lee and P. Lenisa and K. Livingston and Macgregor, {I. J.D.} and D. Marchand and L. Marsicano and V. Mascagna and B. McKinnon and C. McLauchlin and S. Migliorati and M. Mirazita and V. Mokeev and Montgomery, {R. A.} and {Munoz Camacho}, C. and P. Nadel-Turonski and P. Naidoo and K. Neupane and O'Connell, {T. R.} and M. Osipenko and M. Ouillon and P. Pandey and M. Paolone and Pappalardo, {L. L.} and R. Paremuzyan and E. Pasyuk and W. Phelps and O. Pogorelko and J. Poudel and Price, {J. W.} and Y. Prok and Raue, {B. A.} and T. Reed and M. Ripani and A. Rizzo and P. Rossi and J. Rowley and F. Sabati{\'e} and A. Schmidt and Segarra, {E. P.} and Sharabian, {Y. G.} and Shirokov, {E. V.} and U. Shrestha and D. Sokhan and O. Soto and N. Sparveris and Strakovsky, {I. I.} and S. Strauch and N. Tyler and R. Tyson and M. Ungaro and S. Vallarino and L. Venturelli and H. Voskanyan and A. Vossen and E. Voutier and Watts, {D. P.} and K. Wei and X. Wei and R. Wishart and B. Yale and N. Zachariou and J. Zhang and Zhao, {Z. W.}",

note = "Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society.",

year = "2021",

month = dec,

day = "24",

doi = "10.1103/PhysRevLett.127.262501",

language = "English",

volume = "127",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "26",

}

Chatagnon, P, Niccolai, S, Stepanyan, S, Amaryan, MJ, Angelini, G, Armstrong, WR, Atac, H, Ayerbe Gayoso, C, Baltzell, NA, Barion, L, Bashkanov, M, Battaglieri, M, Bedlinskiy, I, Benmokhtar, F, Bianconi, A, Biondo, L, Biselli, AS, Bondi, M, Bossù, F, Boiarinov, S, Briscoe, WJ, Brooks, WK, Bulumulla, D, Burkert, VD, Carman, DS, Carvajal, JC, Caudron, M, Celentano, A, Chetry, T, Ciullo, G, Clark, L, Cole, PL, Contalbrigo, M, Costantini, G, Crede, V, D'Angelo, A, Dashyan, N, Defurne, M, De Vita, R, Deur, A, Diehl, S, Djalali, C, Dupré, R, Egiyan, H, Ehrhart, M, El Alaoui, A, El Fassi, L, Elouadrhiri, L, Fegan, S, Fersch, R, Filippi, A, Gavalian, G, Ghandilyan, Y, Gilfoyle, GP, Girod, FX, Glazier, DI, Golubenko, AA, Gothe, RW, Gotra, Y, Griffioen, KA, Guidal, M, Guo, L, Hakobyan, H, Hattawy, M, Hayward, TB, Heddle, D, Hobart, A, Holtrop, M, Hyde, CE, Ilieva, Y, Ireland, DG, Isupov, EL, Jo, HS, Joo, K, Kabir, ML, Keller, D, Khachatryan, G, Khanal, A, Kim, A, Kim, W, Kripko, A, Kubarovsky, V, Kuhn, SE, Lanza, L, Leali, M, Lee, S, Lenisa, P, Livingston, K, Macgregor, IJD, Marchand, D, Marsicano, L, Mascagna, V, McKinnon, B, McLauchlin, C, Migliorati, S, Mirazita, M, Mokeev, V, Montgomery, RA, Munoz Camacho, C, Nadel-Turonski, P, Naidoo, P, Neupane, K, O'Connell, TR, Osipenko, M, Ouillon, M, Pandey, P, Paolone, M, Pappalardo, LL, Paremuzyan, R, Pasyuk, E, Phelps, W, Pogorelko, O, Poudel, J, Price, JW, Prok, Y, Raue, BA, Reed, T, Ripani, M, Rizzo, A, Rossi, P, Rowley, J, Sabatié, F, Schmidt, A, Segarra, EP, Sharabian, YG, Shirokov, EV, Shrestha, U, Sokhan, D, Soto, O, Sparveris, N, Strakovsky, II, Strauch, S, Tyler, N, Tyson, R, Ungaro, M, Vallarino, S, Venturelli, L, Voskanyan, H, Vossen, A, Voutier, E, Watts, DP, Wei, K, Wei, X, Wishart, R, Yale, B, Zachariou, N, Zhang, J & Zhao, ZW 2021, 'First Measurement of Timelike Compton Scattering', Physical Review Letters, vol. 127, no. 26, 262501. https://doi.org/10.1103/PhysRevLett.127.262501

TY - JOUR

T1 - First Measurement of Timelike Compton Scattering

AU - Chatagnon, P.

AU - Niccolai, S.

AU - Stepanyan, S.

AU - Amaryan, M. J.

AU - Angelini, G.

AU - Armstrong, W. R.

AU - Atac, H.

AU - Ayerbe Gayoso, C.

AU - Baltzell, N. A.

AU - Barion, L.

AU - Bashkanov, M.

AU - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Benmokhtar, F.

AU - Bianconi, A.

AU - Biondo, L.

AU - Biselli, A. S.

AU - Bondi, M.

AU - Bossù, F.

AU - Boiarinov, S.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Bulumulla, D.

AU - Burkert, V. D.

AU - Carman, D. S.

AU - Carvajal, J. C.

AU - Caudron, M.

AU - Celentano, A.

AU - Chetry, T.

AU - Ciullo, G.

AU - Clark, L.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Costantini, G.

AU - Crede, V.

AU - D'Angelo, A.

AU - Dashyan, N.

AU - Defurne, M.

AU - De Vita, R.

AU - Deur, A.

AU - Diehl, S.

AU - Djalali, C.

AU - Dupré, R.

AU - Egiyan, H.

AU - Ehrhart, M.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Elouadrhiri, L.

AU - Fegan, S.

AU - Fersch, R.

AU - Filippi, A.

AU - Gavalian, G.

AU - Ghandilyan, Y.

AU - Gilfoyle, G. P.

AU - Girod, F. X.

AU - Glazier, D. I.

AU - Golubenko, A. A.

AU - Gothe, R. W.

AU - Gotra, Y.

AU - Griffioen, K. A.

AU - Guidal, M.

AU - Guo, L.

AU - Hakobyan, H.

AU - Hattawy, M.

AU - Hayward, T. B.

AU - Heddle, D.

AU - Hobart, A.

AU - Holtrop, M.

AU - Hyde, C. E.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Isupov, E. L.

AU - Jo, H. S.

AU - Joo, K.

AU - Kabir, M. L.

AU - Keller, D.

AU - Khachatryan, G.

AU - Khanal, A.

AU - Kim, A.

AU - Kim, W.

AU - Kripko, A.

AU - Kubarovsky, V.

AU - Kuhn, S. E.

AU - Lanza, L.

AU - Leali, M.

AU - Lee, S.

AU - Lenisa, P.

AU - Livingston, K.

AU - Macgregor, I. J.D.

AU - Marchand, D.

AU - Marsicano, L.

AU - Mascagna, V.

AU - McKinnon, B.

AU - McLauchlin, C.

AU - Migliorati, S.

AU - Mirazita, M.

AU - Mokeev, V.

AU - Montgomery, R. A.

AU - Munoz Camacho, C.

AU - Nadel-Turonski, P.

AU - Naidoo, P.

AU - Neupane, K.

AU - O'Connell, T. R.

AU - Osipenko, M.

AU - Ouillon, M.

AU - Pandey, P.

AU - Paolone, M.

AU - Pappalardo, L. L.

AU - Paremuzyan, R.

AU - Pasyuk, E.

AU - Phelps, W.

AU - Pogorelko, O.

AU - Poudel, J.

AU - Price, J. W.

AU - Prok, Y.

AU - Raue, B. A.

AU - Reed, T.

AU - Ripani, M.

AU - Rizzo, A.

AU - Rossi, P.

AU - Rowley, J.

AU - Sabatié, F.

AU - Schmidt, A.

AU - Segarra, E. P.

AU - Sharabian, Y. G.

AU - Shirokov, E. V.

AU - Shrestha, U.

AU - Sokhan, D.

AU - Soto, O.

AU - Sparveris, N.

AU - Strakovsky, I. I.

AU - Strauch, S.

AU - Tyler, N.

AU - Tyson, R.

AU - Ungaro, M.

AU - Vallarino, S.

AU - Venturelli, L.

AU - Voskanyan, H.

AU - Vossen, A.

AU - Voutier, E.

AU - Watts, D. P.

AU - Wei, K.

AU - Wei, X.

AU - Wishart, R.

AU - Yale, B.

AU - Zachariou, N.

AU - Zhang, J.

AU - Zhao, Z. W.

PY - 2021/12/24

Y1 - 2021/12/24

N2 - We present the first measurement of the timelike Compton scattering process, γp→p′γ∗(γ∗→e+e-), obtained with the CLAS12 detector at Jefferson Lab. The photon beam polarization and the decay lepton angular asymmetries are reported in the range of timelike photon virtualities 2.25

AB - We present the first measurement of the timelike Compton scattering process, γp→p′γ∗(γ∗→e+e-), obtained with the CLAS12 detector at Jefferson Lab. The photon beam polarization and the decay lepton angular asymmetries are reported in the range of timelike photon virtualities 2.25

UR - http://www.scopus.com/inward/record.url?scp=85122535205&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.127.262501

DO - 10.1103/PhysRevLett.127.262501

M3 - Article

C2 - 35029502

AN - SCOPUS:85122535205

SN - 0031-9007

VL - 127

JO - Physical Review Letters

JF - Physical Review Letters

IS - 26

M1 - 262501

ER -

First Measurement of Timelike Compton Scattering

Abstract

Access to Document

Other files and links

Fingerprint

Cite this