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Title Double Polarisation Observable G for Single Pion Photoproduction from the Proton
Authors Nicholas Zachariou,Daniel Watts,Josephine McAndrew,Lorenzo Zana,Mikhail Bashkanov,Igor Strakovski,Ron Workman,Andrey Sarantsev,V. Nikonov,Krishna Adhikari,Shankar Adhikari,Moskov Amaryan,Giovanni Angelini,Whitney Armstrong,Hamza Atac,Nathan Baltzell,Luca Barion,Marco Battaglieri,Ivan Bedlinskiy,Fatiha Benmokhtar,Andrea Bianconi,Angela Biselli,Mariangela Bondi,Francesco Bossu,Sergey Boyarinov,William Briscoe,William Brooks,Dilini Bulumulla,Daniel Carman,Jose Carvajal,Andrea Celentano,Pierre Chatagnon,Taya Chetry,Giuseppe Ciullo,Brandon Clary,Philip Cole,Marco Contalbrigo,Volker Crede,Annalisa D'Angelo,Natalya Dashyan,Raffaella De Vita,Maxime Defurne,Alexandre Deur,Stefan Diehl,Chaden Djalali,Michael Dugger,Raphael Dupre,Hovanes Egiyan,Mathieu Ehrhart,Ahmed El Alaoui,Lamiaa El Fassi,Latifa Elouadrhiri,Paul Eugenio,Gleb Fedotov,Stuart Fegan,Alessandra Filippi,Gagik Gavalian,Gerard Gilfoyle,Francois-Xavier Girod-Gard,Derek Glazier,Ralf Gothe,Keith Griffioen,Lei Guo,Kawtar Hafidi,Hayk Hakobyan,Mohammad Hattawy,David Heddle,Kenneth Hicks,Adam Hobart,Maurik Holtrop,Qinhua Huang,Yordanka Ilieva,David Ireland,Evgeny Isupov,David Jenkins,Hyon-Suk Jo,Kyungseon Joo,Sylvester Joosten,Dustin Keller,Achyut Khanal,Mahbubul Khandaker,Andrey Kim,Franz Klein,Aron Kripko,Valery Kubarovsky,Lucilla Lanza,Marco Leali,Paolo Lenisa,Kenneth Livingston,Ian MacGregor,Dominique Marchand,Luca Marsicano,Valerio Mascagna,Bryan McKinnon,Zein-Eddine Meziani,Taisiya Mineeva,Viktor Mokeev,Aram Movsisyan,Edwin Munevar Espitia,Carlos Munoz Camacho,Pawel Nadel-Turonski,Krishna Neupane,Andrey Ni,Silvia Niccolai,Gabriel Niculescu,Thomas O'Connell,Mikhail Osipenko,Alexander Ostrovidov,Michael Paolone,Luciano Pappalardo,Rafayel Paremuzyan,Eugene Pasyuk,Oleg Pogorelko,Yelena Prok,Dan Protopopescu,Marco Ripani,Barry Ritchie,James Ritman,Alessandro Rizzo,Joseph Rowley,Franck Sabatie,Carlos Salgado,Axel Schmidt,Reinhard Schumacher,Youri Sharabian,Utsav Shrestha,Daria Sokhan,Orlando Soto Sandoval,Nikolaos Sparveris,Stepan Stepanyan,Steffen Strauch,Nicholas Tyler,Maurizio Ungaro,Luca Venturelli,Hakob Voskanyan,Eric Voutier,Xiangdong Wei,Bradley Yale,Jixie Zhang,zhiwen zhao
JLAB number JLAB-PHY-20-3283
LANL number (None)
Other number (None)
Document Type(s) (Journal Article) 
Associated with EIC: No
Supported by Jefferson Lab LDRD Funding: No
Funding Source: Nuclear Physics (NP)
 

Journal
Compiled for Physics Letters B
Publication Abstract: We report measurements of p+ and p0 meson photoproduction from longitudinally spin-polarised protons by an energy tagged (0.73-2.3 GeV) and linearly polarised photon beam. A close to complete solid angle coverage for the reaction products was provided by the CEBAF Large Acceptance Spectrometer at Jefferson Laboratory. The double-polarisation observable G is extracted from Maximum Likelihood fits to the data, enabling the first accurate determination for reaction ~ ~p ! ?+n while also significantly extending the kinematic coverage for ~ ~ ~p ! ?0p. This large data set provides an important constraint on the properties and spectrum of excited nucleon states decaying to Npi in the mass range from 1.4 to 2.2 GeV, as well as for background (non-resonant) photoproduction processes. The considerable improvement achieved in the description of the observable G within the SAID and Bonn-Gatchina approaches after implementation of our data, illustrates that the partial wave analyses now significantly extend the knowledge on Npi photoproduction amplitudes at W > 1:8 GeV. A partial wave analysis using the new high-precision data set have a large impact on the extracted properties of high-spin nucleon excited states.
Experiment Numbers: E03-105
Group: Hall B
Document: pdf
DOI:
Accepted Manuscript:
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