PAPER / ARXIV:2609.19395
K. Neupane , R.W. Gothe , D.S. Carman , V.I. Mokeev , A.G. Acar , P. Achenbach , J.S. Alvarado , W.R. Armstrong , H. Avakian , N.A. Baltzell , L. Barion , M. Bashkanov , M. Battaglieri , F. Benmokhtar , A. Bianconi , A.S. Biselli , A. Biswas , F. Bossù , S. Boiarinov , M. Bondi , K.-Th. Brinkmann , W.J. Briscoe , W.K. Brooks , J. Bryce , N.L. Bucuru R. , V.D. Burkert , T. Cao , A. Celentano , P. Chatagnon , V. Chesnokov , H. Chinchay , G. Ciullo , E.W. Cline , P.L. Cole , M. Contalbrigo , A. D'Angelo , N. Dashyan , R. De Vita , A. Deur , S. Diehl , C. Dilks , C. Djalali , R. Dupre , H. Egiyan , M. Ehrhart , A. El Alaoui , L. El Fassi , L. Elouadrhiri , C. Fanelli , M. Farooq , S. Fegan , I.P. Fernando , E. Ferrand , A. Filippi , M. Filippini , C. Fogler , S. Frantzen , K. Gates , G.P. Gilfoyle , D.I. Glazier , Y. Gotra , S. Gramigna , B. Gualtieri , K. Hafidi , F. Hauenstein , T.B. Hayward , D. Heddle , T. Hellstern , M. Hoballah , M. Holtrop , Y. Ilieva , D.G. Ireland , E.L. Isupov , H.S. Jo , T. Kageya , M. Kerr , V. Klimenko , A. Kripko , V. Kubarovsky , C. Lama , L. Lanza , S. Lee , P. Lenisa , X. Li , D. Martiryan , V. Mascagna , M. Masud , B. McKinnon , A. Mehta , R.G. Milner , R. Milton , M. Mirazita , E.F. Molina Cardenas , C. Munoz Camacho , P. Nadel-Turonski , T. Nagorna , S. Niccolai , G. Niculescu , M. Osipenko , A. Osmond
RESUMO
This paper reports exclusive cross sections for the $ep \to e'\pi^+\pi^-p'$ reaction using the CLAS12 detector at Jefferson Laboratory. The extractions of fully integrated and nine single-differential cross sections are presented for the first time for photon virtualities $Q^2$ from 2.4 to 8.0 GeV$^2$ and center-of-mass energies $W$ from 1.4 to 2.1 GeV, which covers a large part of the nucleon resonance region. These data considerably extend the kinematic reach of previous measurements from CLAS that covered $Q^2$ up to 5.0 GeV$^2$. Exclusive $\gamma_v p \to \pi^+ \pi^-p'$ cross section measurements are of particular importance for the extraction of $\gamma_vpN^*$ resonance electrocouplings across the $N^*$ spectrum, especially in the mass range above 1.6 GeV where several resonances decay preferentially to the $\pi\pi N$ final states. The electrocouplings with extended $Q^2$ coverage expected from these new data will enable an improved understanding of the emergence of $N^*$ mass and structure in the transition from the strongly coupled toward the perturbative QCD regime.
NO MESMO MAPA