Components of polarization-transfer to a bound proton in a deuteron measured by quasi-elastic electron scattering

A1 Collaboration

doi:10.1016/j.physletb.2018.03.063

Components of polarization-transfer to a bound proton in a deuteron measured by quasi-elastic electron scattering

A1 Collaboration

Racah Institute of Physics

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9 Scopus citations

Abstract

We report the first measurements of the transverse (P_x and P_y) and longitudinal (P_z) components of the polarization transfer to a bound proton in the deuteron via the H2(e→,e^′p→) reaction, over a wide range of missing momentum. A precise determination of the electron beam polarization reduces the systematic uncertainties on the individual components to a level that enables a detailed comparison to a state-of-the-art calculation of the deuteron using free-proton electromagnetic form factors. We observe very good agreement between the measured and the calculated P_x/P_z ratios, but deviations of the individual components. Our results cannot be explained by medium modified electromagnetic form factors. They point to an incomplete description of the nuclear reaction mechanism in the calculation.

Original language	English
Pages (from-to)	107-111
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	781
DOIs	https://doi.org/10.1016/j.physletb.2018.03.063
State	Published - 10 Jun 2018

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10.1016/j.physletb.2018.03.063

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@article{825655f60d49498ab8e53a6d86708364,

title = "Components of polarization-transfer to a bound proton in a deuteron measured by quasi-elastic electron scattering",

abstract = "We report the first measurements of the transverse (Px and Py) and longitudinal (Pz) components of the polarization transfer to a bound proton in the deuteron via the H2(e→,e′p→) reaction, over a wide range of missing momentum. A precise determination of the electron beam polarization reduces the systematic uncertainties on the individual components to a level that enables a detailed comparison to a state-of-the-art calculation of the deuteron using free-proton electromagnetic form factors. We observe very good agreement between the measured and the calculated Px/Pz ratios, but deviations of the individual components. Our results cannot be explained by medium modified electromagnetic form factors. They point to an incomplete description of the nuclear reaction mechanism in the calculation.",

author = "{A1 Collaboration} and D. Izraeli and I. Yaron and Schlimme, {B. S.} and P. Achenbach and H. Arenh{\"o}vel and A. Ashkenazi and J. Beri{\v c}i{\v c} and R. B{\"o}hm and D. Bosnar and Cohen, {E. O.} and Distler, {M. O.} and A. Esser and I. Fri{\v s}{\v c}i{\'c} and R. Gilman and I. Korover and J. Lichtenstadt and I. Mardor and H. Merkel and Middleton, {D. G.} and M. Mihovilovi{\v c} and U. M{\"u}ller and M. Olivenboim and E. Piasetzky and J. Pochodzalla and G. Ron and M. Schoth and F. Schulz and C. Sfienti and S. {\v S}irca and S. {\v S}tajner and S. Strauch and M. Thiel and A. Tyukin and A. Weber",

note = "Publisher Copyright: {\textcopyright} 2018 The Author",

year = "2018",

month = jun,

day = "10",

doi = "10.1016/j.physletb.2018.03.063",

language = "אנגלית",

volume = "781",

pages = "107--111",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

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TY - JOUR

T1 - Components of polarization-transfer to a bound proton in a deuteron measured by quasi-elastic electron scattering

AU - A1 Collaboration

AU - Izraeli, D.

AU - Yaron, I.

AU - Schlimme, B. S.

AU - Achenbach, P.

AU - Arenhövel, H.

AU - Ashkenazi, A.

AU - Beričič, J.

AU - Böhm, R.

AU - Bosnar, D.

AU - Cohen, E. O.

AU - Distler, M. O.

AU - Esser, A.

AU - Friščić, I.

AU - Gilman, R.

AU - Korover, I.

AU - Lichtenstadt, J.

AU - Mardor, I.

AU - Merkel, H.

AU - Middleton, D. G.

AU - Mihovilovič, M.

AU - Müller, U.

AU - Olivenboim, M.

AU - Piasetzky, E.

AU - Pochodzalla, J.

AU - Ron, G.

AU - Schoth, M.

AU - Schulz, F.

AU - Sfienti, C.

AU - Širca, S.

AU - Štajner, S.

AU - Strauch, S.

AU - Thiel, M.

AU - Tyukin, A.

AU - Weber, A.

PY - 2018/6/10

Y1 - 2018/6/10

N2 - We report the first measurements of the transverse (Px and Py) and longitudinal (Pz) components of the polarization transfer to a bound proton in the deuteron via the H2(e→,e′p→) reaction, over a wide range of missing momentum. A precise determination of the electron beam polarization reduces the systematic uncertainties on the individual components to a level that enables a detailed comparison to a state-of-the-art calculation of the deuteron using free-proton electromagnetic form factors. We observe very good agreement between the measured and the calculated Px/Pz ratios, but deviations of the individual components. Our results cannot be explained by medium modified electromagnetic form factors. They point to an incomplete description of the nuclear reaction mechanism in the calculation.

AB - We report the first measurements of the transverse (Px and Py) and longitudinal (Pz) components of the polarization transfer to a bound proton in the deuteron via the H2(e→,e′p→) reaction, over a wide range of missing momentum. A precise determination of the electron beam polarization reduces the systematic uncertainties on the individual components to a level that enables a detailed comparison to a state-of-the-art calculation of the deuteron using free-proton electromagnetic form factors. We observe very good agreement between the measured and the calculated Px/Pz ratios, but deviations of the individual components. Our results cannot be explained by medium modified electromagnetic form factors. They point to an incomplete description of the nuclear reaction mechanism in the calculation.

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U2 - 10.1016/j.physletb.2018.03.063

DO - 10.1016/j.physletb.2018.03.063

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AN - SCOPUS:85044945612

SN - 0370-2693

VL - 781

SP - 107

EP - 111

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Components of polarization-transfer to a bound proton in a deuteron measured by quasi-elastic electron scattering

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