[Clas_hadron] [EXTERNAL] Abstract for Hadron2023

[Bryan McKinnon]

Dear all

Please see below the abstract that Pierre is submitting for Hadron2023. Since his presentation covers aspects and analyses under the HSWG, the abstract is being made available to both WGs.

Regards
Bryan


> Begin forwarded message:
> 
> From: Pierre Chatagnon via Deeppwg <deeppwg at jlab.org>
> Subject: [Deeppwg] Abstract for Hadron2023
> Date: 11 April 2023 at 21:34:03 BST
> To: "deeppwg at jlab.org" <deeppwg at jlab.org>
> Reply-To: Pierre Chatagnon <pierrec at jlab.org>
> 
> Dear all,
>  
> You will find below the abstract I am planning to submit to the Hadron2023 conference in Genova.
> Please send me your comments and feedbacks
>  
> Best regards
> Pierre
>  
> Abstract for Hadrons 2023
>  
> Exploring the gravitational structure of the proton with the dilepton final state using the CLAS12 detector at Jefferson Lab: from Timelike Compton Scattering to near-threshold J/Psi photoproduction
>  
> The Gravitational Form Factors (GFFs) give access to the internal distributions of mass, pressure and shear force inside the proton. They were considered experimentally unmeasurable for decades due to the very weak gravitational interaction [1]. However, the Generalized Parton Distributions (GPDs), which describe the correlations between the longitudinal momentum and the transverse position of the partons inside the nucleon, have lately been related to the GFFs. For the first time, this relation gives the opportunity to extract GFFs experimentally.  In this talk, I will present two ways to access GFFs using data taken in 2018 by the CLAS12 detector with a 10.6 GeV electron beam impinging on a liquid-hydrogen target. First, I will present the first measurement of the Timelike Compton Scattering reaction (the hard photoproduction of a lepton pair), that gives access to the quark GFFs via the angular asymmetry of the electron/positron pair. I will then present the current effort to extract the near-threshold J/ψ photoproduction cross section using the same dataset. This later measurement is expected to provide direct insight on the gluons GFFs of the proton.
> [1] H. PAGELS. Energy-Momentum Structure Form Factors of Particles. Phys.Rev. 144 (1966) 1250-1260
>  
> _______________________________________________
> Deeppwg mailing list
> Deeppwg at jlab.org <mailto:Deeppwg at jlab.org>
> https://mailman.jlab.org/mailman/listinfo/deeppwg

___________________________________

Dr. Bryan McKinnon

Nuclear and Hadron Physics Research
School of Physics and Astronomy
University of Glasgow
Glasgow
G12 8QQ
Scotland UK

Tel: (+44/0) 141-330-7226
___________________________________

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/clas_hadron/attachments/20230412/1f997098/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 1927 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/clas_hadron/attachments/20230412/1f997098/attachment-0001.p7s>