First measurement of proton's charge form factor at very low $Q^2$ with initial state radiation

Autor: Michaela Thiel, M. O. Distler, J. Beričič, M. Mihovilovič, Concettina Sfienti, Jan C. Bernauer, L. Nungesser, S. Širca, Ivica Friščić, A. G. Denig, T. Beranek, D. G. Middleton, J. Pochodzalla, P. Achenbach, R. Böhm, F. Schulz, A. Tyukin, Damir Bosnar, K. A. Griffioen, M. I. Ferretti Bondy, Marc Vanderhaeghen, Y. Kohl, M. Cardinali, M. Rohrbeck, L. Debenjak, M. Schoth, L. Correa, M. Hoek, B. S. Schlimme, M. Weinriefer, U. Müller, S. Sánchez Majos, S. Kegel, S. Štajner, H. Fonvieille, A. Weber, Anselm Esser, J.M. Friedrich, Harald Merkel
Přispěvatelé: Laboratoire de Physique de Clermont (LPC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne (UCA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique de Clermont ( LPC ), Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Clermont Auvergne ( UCA ) -Centre National de la Recherche Scientifique ( CNRS )
Jazyk: angličtina
Rok vydání: 2017
Předmět:
experimental methods
Proton
elastic scattering
01 natural sciences
High Energy Physics - Experiment
Lamb shift
High Energy Physics - Experiment (hep-ex)
Initial state radiation
Form factor
Radiative corrections
Radiative transfer
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
[ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex]
Nuclear Experiment (nucl-ex)
Nuclear Experiment
Microtron
Elastic scattering
Physics
Form factor (quantum field theory)
beam: current
lcsh:QC1-999
3. Good health
PRIRODNE ZNANOSTI. Fizika
Nuclear and High Energy Physics
FOS: Physical sciences
Bethe-Heitler
25.30.Bf
Radiation
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Nuclear physics
electron p: scattering
Mainz Linac
[ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex]
12.20.-m
0103 physical sciences
radiation: initial-state interaction
010306 general physics
numerical calculations
form factor: charge
41.60.-m
010308 nuclear & particles physics
Scattering
p: charge
NATURAL SCIENCES. Physics
microtron
spectrometer
lcsh:Physics
experimental results
Zdroj: Physics Letters B
Physics Letters B, Elsevier, 2017, 771, pp.194-198. ⟨10.1016/j.physletb.2017.05.031⟩
Physics Letters B, Vol 771, Iss, Pp 194-198 (2017)
Volume 771
Phys.Lett.B
Phys.Lett.B, 2017, 771, pp.194-198. ⟨10.1016/j.physletb.2017.05.031⟩
Phys.Lett.B, 2017, 771, pp.194-198. 〈10.1016/j.physletb.2017.05.031〉
ISSN: 0370-2693
Popis: We report on a new experimental method based on initial-state radiation (ISR) in e-p scattering, in which the radiative tail of the elastic e-p peak contains information on the proton charge form factor ($G_E^p$) at extremely small $Q^2$. The ISR technique was validated in a dedicated experiment using the spectrometers of the A1-Collaboration at the Mainz Microtron (MAMI). This provided first measurements of $G_E^p$ for $0.001\leq Q^2\leq 0.004 (GeV/c)^2$.
Comment: 6 pages, 3 figures
Databáze: OpenAIRE
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