[Hybrid baryons] Hall-B/JPAC Meeting

[Viktor Mokeev]

Dear Colleagues,

 Please find the slide of the talk by Dr. V.Braun ``Electroproduction of $N^\ast(1535)$ nucleon resonance at large momentum
transfers in QCD" scheduled for tomorrow May 27, 4 pm in L102 CEBAF Center in:

https://userweb.jlab.org/~mokeev/HALLB_PAC_meetings/052715/

   Best Regards,
                          Victor

----- Original Message -----
From: "Viktor Mokeev" <mokeev at jlab.org>
To: "burkert" <burkert at jlab.org>, "Robert McKeown" <bmck at jlab.org>, "rossi" <rossi at lnf.infn.it>, "Rolf Ent" <ent at jlab.org>, "Michael Pennington" <michaelp at jlab.org>, "Daniel Carman" <carman at jlab.org>, "A.M. Sandorfi" <sandorfi at jlab.org>, "pasyuk" <pasyuk at jlab.org>, "Tsuneo Kageya" <kageya at jlab.org>, "Tsung-Shung H. Lee" <tshlee at anl.gov>, "Harut Avakian" <avakian at jlab.org>, "Stepan Stepanyan" <stepanya at jlab.org>, "Francois-Xavier Girod" <fxgirod at jlab.org>, "Valery Kubarovsky" <vpk at jlab.org>, "Veronique Ziegler" <ziegler at jlab.org>, "hybrid baryons" <hybrid_baryons at jlab.org>, "clas hadron" <clas_hadron at jlab.org>, "Maurizio Ungaro" <ungaro at jlab.org>, "Kijun Park" <parkkj at jlab.org>, "aszczepa" <aszczepa at indiana.edu>, "Emilie Passemar" <epassema at indiana.edu>, "Vincent Mathieu" <vincent.mathieu at umons.ac.be>, "Igor Danilkin" <danilkin at jlab.org>, "lingyun at jlab.org Dai" <lingyun at jlab.org>, "César Fernández Ramírez" <cefera at gmail.com>, "Haiyan Gao" <gao at phy.duke.edu>, "Garcon Michel" <michel.garcon at cea.fr>, "cdroberts" <cdroberts at anl.gov>, "Ian Cloet" <icloet at anl.gov>, "Jorge Segovia" <segonza at usal.es>, "dgr" <dgr at jlab.org>, "Robert Edwards" <edwards at jlab.org>, "dudek" <dudek at jlab.org>, "radyush" <radyush at jlab.org>, "Christian Weiss" <weiss at jlab.org>, "David Wilson" <djwilson at jlab.org>, "Bruno El-Bennich" <bruno.elbennich at lpnhe.in2p3.fr>, "Franz Gross" <gross at jlab.org>, "Alexei Prokudin" <prokudin at jlab.org>, "Ralf Gothe" <gothe at sc.edu>, "Ye Tian" <tian at physics.sc.edu>, "Nick Markov" <markov at jlab.org>, "NICHOLAS TYLER" <tylerns at email.sc.edu>, "Paul Stoler" <stolep at rpi.edu>, "Philip Cole" <colephil at isu.edu>, "Philip Cole" <philipcole.online at gmail.com>, "Wally Melnitchouk" <wmelnitc at jlab.org>, "Meng Shi" <mengshi at jlab.org>, "Mac Mestayer" <mestayer at jlab.org>, "mamaryan" <mamaryan at odu.edu>, "bsi" <bsi at depni.sinp.msu.ru>, "Evgeny Golovach" <golovach at jlab.org>, "Evgeny Isupov" <isupov at jlab.org>, "Ken Hicks" <hicks at jlab.org>, "Toru Sato" <tsato at jlab.org>, "Kyungseon Joo" <kjoo at phys.uconn.edu>, "Mauro Giannini" <mauro.giannini at ge.infn.it>, "santopinto" <santopinto at ge.infn.it>, "Юлия Скородумина" <skorodumina at gmail.com>, "Gleb Fedotov" <gleb at jlab.org>, "klempt" <klempt at hiskp.uni-bonn.de>, "Igor Strakovsky" <igor at va.gwu.edu>, "Helmut Haberzettl" <helmut at jlab.org>, "Bill Briscoe" <briscoe at jlab.org>, "Angela Biselli" <biselli at jlab.org>, "Volker Crede" <crede at jlab.org>, "Hovanes Egiyan" <hovanes at jlab.org>, "Eugene Chudakov" <gen at jlab.org>, "Cynthia Keppel" <keppel at jlab.org>, "Ronald Workman" <rworkman at gwu.edu>, "Bogdan Wojtsekhowski" <bogdanw at jlab.org>, "Anthony Thomas" <awthomas at jlab.org>, "Huey-Wen Lin" <hwlin at phys.washington.edu>, "Simonetta Liuti" <sl4y at cms.mail.virginia.edu>, "Jose Goity" <goity at jlab.org>
Cc: "Vladimir Braun" <vladimir.braun at physik.uni-regensburg.de>
Sent: Saturday, May 23, 2015 5:37:17 PM
Subject: Hall-B/JPAC Meeting

Dear Colleagues,

 We will have the next Hall-B/JPAC Meeting focused on the QCD-based interpretation of gvNN* electrocouplings and access to the partonic structure of  N* states next Wednesday, May 27th, 4 p.m. Room# L102 CEBAF Center with the talk by Prof. Dr. V.Braun, Univ of Regensburg (Germany), entitled (please read below the abstract):

``Electroproduction of $N^\ast(1535)$ nucleon resonance at large momentum
transfers in QCD"

Abstract:

Following the 12 GeV upgrade, a dedicated experiment is planned with the
Hall B CLAS12 detector
at  Jefferson Lab, with the aim to study electroproduction of nucleon
resonances at
high photon virtualities up to $Q^2 = 12$~GeV$^2$.
In this work we present a QCD-based approach to the theoretical
interpretation of these
upcoming results in the framework of light-cone sum rules.
The essence of this technique is that soft Feynman contributions to the
form factors
are calculated in terms of small transverse distance quantities using
dispersion relations and duality.
The form factors are thus expressed in terms of $N^\ast(1535)$ light-front
wave functions at small
transverse separations, called distribution amplitudes, without any
additional parameters.
Alternatively, the distribution amplitudes can be extracted from the
comparison with the
experimental data on form factors and compared to the results of lattice
QCD simulations.
The results of the corresponding next-to-leading order calculation are
presented and compared with the
existing data. We find that the form factors are dominated by the
next-to-leading twist-four distribution amplitudes
that are related to the $P$-wave three-quark wave functions of
$N^\ast(1535)$, i.e. contributions of orbital
angular momentum.

  If you want to participate remotely, please send me in reply the e-mail address to submit the invitation through Blue Jean Meeting tool.

Looking forward to see you at Meeting,

  On behalf of Hall-B and JPAC:

                                   V.Mokeev