Measurement of the axial and the strangeness magnetic form factor of the proton with a P2 backward angle setup

Baunack, S.; Becker, D.; Gerz, K.; Kumar, K.; Maas, F. E.
November 2013
AIP Conference Proceedings;Nov2013, Vol. 1563 Issue 1, p73
Academic Journal
The P2 experiment at the future accelerator facility MESA in Mainz aims for a precise determination of the weak charge of the proton at low momentum transfer. The experimental method is a measurement of the parity violating asymmetry in elastic electron-proton scattering at forward angle. This asymmetry is dominated by the weak charge, but also the proton structure plays a role. Here we consider a back angle measurement, which is more sensitive to the proton structure, and present its possible implications on the main P2 measurement.


Related Articles

  • Electromagnetic form factor via Bethe-Salpeter amplitude in Minkowski space. Carbonell, J.; Karmanov, V.; Mangin-Brinet, M. // European Physical Journal A -- Hadrons & Nuclei;Jan2009, Vol. 39 Issue 1, p53 

    For a relativistic system of two scalar particles, we find the Bethe-Salpeter amplitude in Minkowski space and use it to compute the electromagnetic form factor. The comparison with Euclidean space calculation shows that the Wick rotation in the form factor integral induces errors which increase...

  • Analytic continuation of the pion form factor from the spacelike to the timelike domain. Krutov, A.; Nefedov, M.; Troitsky, V. // Theoretical & Mathematical Physics;Mar2013, Vol. 174 Issue 3, p331 

    We solve the problem of analytically continuing the electromagnetic pion form factor into the complex domain of transferred momenta. We treat the pion as a composite quark-antiquark system. We demonstrate that the analytic properties of the form factor calculated in the framework of relativistic...

  • Measurement of the electric neutron form factor G[sub en] in the exclusive reaction [sup 3]Hvector e(evector ,e[sup ′]n) at momentum transfer Q[sup 2]=0.67 (GeV/c)[sup 2]. Bermuth, J. // AIP Conference Proceedings;2001, Vol. 603 Issue 1, p331 

    The experiment to measure Gen in the quasielastic reaction [sup 3]He(e, e' n) at fourmomentum transfer Q² = 0.67 (GeV/c)² has been continued in June 2000. The asymmetry with respect to reversal of the electron helicity has been measured both for perpendicular and for parallel orientation...

  • Determination of the most appropriate form factor equation for Cupresus sempervirence L. var horizentalis in the north of Iran. Kalantari, Hassan; Fallah, Asghar; Hodjati, Seyed Mohammad; Parsakhoo, Aidin // Advances in Applied Science Research;Apr2012, Vol. 3 Issue 2, p644 

    To determine the best form factor equation for Cupresus semervirence afforestation in Abbas Abad of Behshahr, numbers of 40 trees were selected in terms of their diameter classes, from 8 to 16 cm in 2 cm diameter classes. Then diameter at breast height (1.3 m), diameter at 0.65 m and diameter at...

  • On the Neutrino Vector and Axial Vector Charge Radius. Nardi, Enrico // AIP Conference Proceedings;2003, Vol. 670 Issue 1, p118 

    A Majorana neutrino is characterized by just one flavor diagonal electromagnetic form factor: the anapole moment, that in the static limit corresponds to the axial vector charge radius 〈r[SUP2,SUBA]〉. As is the case for the vector charge radius of a Dirac neutrino, proving that this...

  • Improved bounds on the radius and curvature of the K $ \pi$ scalar form factor and implications to low-energy theorems. Abbas, Gauhar; Ananthanarayan, B. // European Physical Journal A -- Hadrons & Nuclei;Jul2009, Vol. 41 Issue 1, p7 

    We obtain stringent bounds in the 〈 r2 $ \rangle_{S}^{{K\pi}}$ - c plane where these are the scalar radius and the curvature parameters of the scalar K $ \pi$ form factor, respectively, using analyticity and dispersion relation constraints, the knowledge of the form factor from the...

  • Elastic and transition form factors of light pseudoscalar mesons from QCD sum rules. Balakireva, I.; Lucha, W.; Melikhov, D. // Physics of Atomic Nuclei;Mar2013, Vol. 76 Issue 3, p326 

    We revisit F( Q) and F( Q), P = π, η, η′, making use of the local-duality (LD) version of QCD sum rules. We give arguments that the LD sum rule provides reliable predictions for these form factors at Q ≥ 5-6 GeV, the accuracy of the method increasing with Q in this region....

  • Form factors of ηc in light-front quark model. Geng, Chao-Qiang; Lih, Chong-Chung // European Physical Journal C -- Particles & Fields;Aug2013, Vol. 73 Issue 8, p1 

    We study the form factors of the ηc meson in the light-front quark model. We explicitly show that the transition form factor of ηc→ γ∗γ as a function of the momentum transfer is consistent with the experimental data by the BaBar collaboration, while the decay constant of...

  • Exploring the γ* p → Δ(1232) Transition at Low Q2 Using CLAS. Smith, L. C. // AIP Conference Proceedings;4/17/2007, Vol. 904 Issue 1, p222 

    Precision measurements of the p(e, e′ p)π0 reaction were performed using the CEBAF Large Acceptance Spectrometer (CLAS) in the range of photon invariant momentum transfer Q2 = 0.16 – 0.36 GeV2. Fits to the data using both a Unitary Isobar Model and the Sato-Lee dynamical model...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics