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42 results on '"Schlimme, B.S."'

1. A highly segmented neutron polarimeter for A1

Author

Spreckels, R., Hoek, M., Müller, U., Thiel, M., Achenbach, P., Bosnar, D., Caiazza, S., Distler, M.O., Doria, L., Eckert, P., Esser, A., Fonvieille, H., Geimer, J., Herrmann, P., Kegel, S., Klag, P., Lunkenheimer, S., Makek, M., Markus, D., Merkel, H., Mihovilovič, M., Müller, J., Pochodzalla, J., Rausch, J., Schlimme, B.S., Sfienti, C., and Širca, S.

Published
2024
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2. The spectrometer and target systems for hypernuclear physics at the Mainz Microtron

Author

Achenbach, P., Akiyama, T., Distler, M.O., Eckert, P., Esser, A., Geratz, J., Hoek, M., Itabashi, K., Kaneta, M., Kino, R., Klag, P., Merkel, H., Mizuno, M., Müller, J., Müller, U., Nagao, S., Nakamura, S.N., Nakamura, Y.R., Okuyama, K., Pochodzalla, J., Schlimme, B.S., Sfienti, C., Spreckels, R., Steinen, M., Tachibana, K., Thiel, M., Uehara, K., and Toyama, Y.

Published
2022
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3. Operation and characterization of a windowless gas jet target in high-intensity electron beams

Author

Schlimme, B.S., Aulenbacher, S., Brand, P., Littich, M., Wang, Y., Achenbach, P., Ball, M., Bernauer, J.C., Biroth, M., Bonaventura, D., Bosnar, D., Caiazza, S., Christmann, M., Cline, E., Denig, A., Distler, M.O., Doria, L., Eckert, P., Esser, A., Friščić, I., Gagneur, S., Geimer, J., Grieser, S., Gülker, P., Herrmann, P., Hoek, M., Kegel, S., Kelsey, J., Klag, P., Khoukaz, A., Kohl, M., Kolar, T., Lauß, M., Leßmann, L., Lunkenheimer, S., Marekovič, J., Markus, D., Mauch, M., Merkel, H., Mihovilovič, M., Milner, R.G., Müller, J., Müller, U., Petrovič, T., Pochodzalla, J., Rausch, J., Schlaadt, J., Schürg, H., Sfienti, C., Širca, S., Spreckels, R., Stengel, S., Stöttinger, Y., Szyszka, C., Thiel, M., Vestrick, S., and Vidal, C.

Published
2021
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4. Electron beam studies of light collection in a scintillating counter with embedded fibers

Author

Lauß, M., Achenbach, P., Aulenbacher, S., Ball, M., Beltschikow, I., Biroth, M., Brand, P., Caiazza, S., Christmann, M., Corell, O., Denig, A., Doria, L., Drexler, P., Geimer, J., Gülker, P., Kolar, T., Lauth, W., Littich, M., Lupberger, M., Lunkenheimer, S., Markus, D., Mauch, M., Merkel, H., Mihovilovič, M., Müller, J., Schlimme, B.S., Sfienti, C., Širca, S., Stengel, S., Szyszka, C., and Vestrick, S.

Published
2021
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5. Detector response of Cherenkov radiators for calorimetry in the energy range below 14 MeV

Author

Christmann, M., Burger, P.F., Achenbach, P., Aulenbacher, S., Ball, M., Baunack, S., Bernauer, J.C., Biroth, M., Brand, P., Caiazza, S., Cline, E., Denig, A., Doria, L., Friščić, I., Geimer, J., Gülker, P., Khoukaz, A., Kohl, M., Kolar, T., Lauß, M., Lauth, W., Littich, M., Lupberger, M., Lunkenheimer, S., Maas, F.E., Mauch, M., Merkel, H., Mihovilovič, M., Milner, R.G., Müller, J., Rausch, J., Schlimme, B.S., Sfienti, C., Širca, S., Stengel, S., Szyszka, C., Vestrick, S., and Wang, Y.

Published
2020
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6. Timing in a FLASH

Author

Hoek, M., Cardinali, M., Corell, O., Dickescheid, M., Ferretti B., M.I., Lauth, W., Schlimme, B.S., Sfienti, C., and Thiel, M.

Published
2017
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7. Vertical Beam Polarization at MAMI

Author

Schlimme, B.S., Achenbach, P., Aulenbacher, K., Baunack, S., Bender, D., Beričič, J., Bosnar, D., Correa, L., Dehn, M., Distler, M.O., Esser, A., Fonvieille, H., Friščić, I., Gutheil, B., Herrmann, P., Hoek, M., Kegel, S., Kohl, Y., Kolar, T., Kreidel, H.-J., Maas, F., Merkel, H., Mihovilovič, M., Müller, J., Müller, U., Nillius, F., Nuck, A., Pochodzalla, J., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Spruck, B., Štajner, S., Thiel, M., Tioukine, V., Tyukin, A., and Weber, A.

Published
2017
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8. Measurement of polarization transfer in the quasi-elastic [formula omitted] process

Author

Kolar, T., Achenbach, P., Christmann, M., Distler, M.O., Doria, L., Eckert, P., Esser, A., Giusti, C., Geimer, J., Gülker, P., Hoek, M., Klag, P., Lichtenstadt, J., Littich, M., Manoussos, T., Markus, D., Merkel, H., Mihovilovič, M., Müller, J., Müller, U., Pätschke, J., Paul, S.J., Piasetzky, E., Plura, S., Pochodzalla, J., Požun, M., Ron, G., Schlimme, B.S., Sfienti, C., Stengel, S., Stephan, E., Strauch, S., Szyszka, C., Širca, S., Thiel, M., and Wilczek, A.

Published
2023
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9. Ground-state binding energy of [formula omitted] from high-resolution decay-pion spectroscopy

Author

Schulz, F., Achenbach, P., Aulenbacher, S., Beričič, J., Bleser, S., Böhm, R., Bosnar, D., Correa, L., Distler, M.O., Esser, A., Fonvieille, H., Friščić, I., Fujii, Y., Fujita, M., Gogami, T., Kanda, H., Kaneta, M., Kegel, S., Kohl, Y., Kusaka, W., Margaryan, A., Merkel, H., Mihovilovič, M., Müller, U., Nagao, S., Nakamura, S.N., Pochodzalla, J., Sanchez Lorente, A., Schlimme, B.S., Schoth, M., Sfienti, C., Širca, S., Steinen, M., Takahashi, Y., Tang, L., Thiel, M., Tsukada, K., Tyukin, A., and Weber, A.

Published
2016
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10. Prospects for hypernuclear physics at Mainz: From KAOS@MAMI to PANDA@FAIR

Author

Esser, A., Nagao, S., Schulz, F., Bleser, S., Steinen, M., Achenbach, P., Ayerbe Gayoso, C., Böhm, R., Borodina, O., Bosnar, D., Botvina, A., Bozkurt, V., Debenjak, L., Distler, M.O., Friščić, I., Fujii, Y., Gogami, T., Gómez Rodríguez, M., Hashimoto, O., Hirose, S., Kanda, H., Kaneta, M., Kim, E., Kohl, Y., Kusaka, J., Margaryan, A., Merkel, H., Mihovilovič, M., Müller, U., Nakamura, S.N., Pochodzalla, J., Rappold, C., Reinhold, J., Saito, T.R., Sanchez Lorente, A., Sánchez Majos, S., Schlimme, B.S., Schoth, M., Sfienti, C., Širca, S., Tang, L., Thiel, M., Tsukada, K., Weber, A., and Yoshida, K.

Published
2013
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11. Overview of the electromagnetic production of strange mesons at MAMI

Author

Achenbach, P., Gómez Rodríguez, M., Tsukada, K., Ayerbe Gayoso, C., Böhm, R., Borodina, O., Bosnar, D., Bozkurt, V., Bydžovský, P., Debenjak, L., Distler, M.O., Esser, A., Friščić, I., Fujii, Y., Gogami, T., Hashimoto, O., Hirose, S., Kanda, H., Kaneta, M., Kim, E., Margaryan, A., Merkel, H., Müller, U., Nagao, S., Nakamura, S.N., Pochodzalla, J., Rappold, C., Reinhold, J., Saito, T.R., Sanchez Lorente, A., Sánchez Majos, S., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Tang, L., and Thiel, M.

Published
2013
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12. Strange hadronic physics in electroproduction experiments at the Mainz Microtron

Author

Achenbach, P., Esser, A., Ayerbe Gayoso, C., Böhm, R., Borodina, O., Bosnar, D., Bozkurt, V., Bydžovský, P., Debenjak, L., Distler, M.O., Friščić, I., Fujii, Y., Gogami, T., Gómez Rodríguez, M., Hashimoto, O., Hirose, S., Kim, E., Margaryan, A., Merkel, H., Müller, U., Nagao, S., Nakamura, S.N., Pochodzalla, J., Rappold, C., Reinhold, J., Saito, T.R., Sanchez Lorente, A., Sánchez Majos, S., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Tang, L., Thiel, M., and Tsukada, K.

Published
2012
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13. Measurements of the electron-helicity asymmetry in the quasi-elastic Process

Author

Kolar, T., Paul, S.J., Achenbach, P., Arenhövel, H., Ashkenazi, A., Beričič, J., Böhm, R., Bosnar, D., Brecelj, T., Cline, E., Cohen, E.O., Distler, M.O., Esser, A., Friščić, I., Gilman, R., Giusti, C., Heilig, M., Hoek, M., Izraeli, D., Kegel, S., Klag, P., Korover, I., Lichtenstadt, J., Mardor, I., Merkel, H., Middleton, D.G., Mihovilovič, M., Müller, J., Müller, U., Olivenboim, M., Piasetzky, E., Pochodzalla, J., Ron, G., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Spreckels, R., Štajner, S., Stöttinger, Y., Strauch, S., Thiel, M., Tyukin, A., Weber, A., and Yaron, I.

Abstract

We present measurements of the electron helicity asymmetry in quasi-elastic proton knockout from $^{2}$H and $^{12}$C nuclei by polarized electrons. This asymmetry depends on the fifth structure function, is antisymmetric with respect to the scattering plane, and vanishes in the absence of final-state interactions, and thus it provides a sensitive tool for their study. Our kinematics cover the full range in off-coplanarity angle ϕpq, with a polar angle θpq coverage up to about 8°. The missing energy resolution enabled us to determine the asymmetries for knock-out resulting in different states of the residual $^{11}$B system. We find that the helicity asymmetry for p-shell knockout from $^{12}$C depends on the final state of the residual system and is relatively large (up to ≈0.16), especially at low missing momentum. It is considerably smaller (up to ≈0.01) for s-shell knockout from both $^{12}$C and $^{2}$H. The data for $^{2}$H are in very good agreement with theoretical calculations, while the predictions for $^{12}$C exhibit differences with respect to the data.

Published
2022

14. Measurements of the electron-helicity asymmetry in the quasi-elastic [formula omitted] process

Author

Kolar, T., Paul, S.J., Achenbach, P., Arenhövel, H., Ashkenazi, A., Beričič, J., Böhm, R., Bosnar, D., Brecelj, T., Cline, E., Cohen, E.O., Distler, M.O., Esser, A., Friščić, I., Gilman, R., Giusti, C., Heilig, M., Hoek, M., Izraeli, D., Kegel, S., Klag, P., Korover, I., Lichtenstadt, J., Mardor, I., Merkel, H., Middleton, D.G., Mihovilovič, M., Müller, J., Müller, U., Olivenboim, M., Piasetzky, E., Pochodzalla, J., Ron, G., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Spreckels, R., Štajner, S., Stöttinger, Y., Strauch, S., Thiel, M., Tyukin, A., Weber, A., and Yaron, I.

Published
2022
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15. First measurements of Λ and [formula omitted] hyperons in elementary electroproduction at MAMI

Author

Achenbach, P., Gayoso, C. Ayerbe, Bernauer, J.C., Bianchin, S., Böhm, R., Borodina, O., Bosnar, D., Bozkurt, V., Debenjak, L., Denig, A., Distler, M.O., Esser, A., Fonvieille, H., Friščić, I., Göküzüm, B., Grießinger, K., Kim, E., Maas, F.E., Makek, M., Merkel, H., Minami, S., Müller, U., Nakajima, D., Nungesser, L., Özel-Tashenov, B., Pochodzalla, J., Potokar, M., Rappold, Ch., Saito, T.R., Sánchez Majos, S., Schlimme, B.S., Širca, S., and Weinriefer, M.

Published
2010
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17. Measurements of the induced polarization in the quasi-elastic [formula omitted] process in non-coplanar kinematics

Author

Paul, S.J., Kolar, T., Brecelj, T., Achenbach, P., Arenhövel, H., Ashkenazi, A., Beričič, J., Böhm, R., Bosnar, D., Cline, E., Cohen, E.O., Debenjak, L., Distler, M.O., Esser, A., Friščić, I., Gilman, R., Giusti, C., Heilig, M., Hoek, M., Izraeli, D., Kegel, S., Klag, P., Kohl, Y., Korover, I., Lichtenstadt, J., Mardor, I., Merkel, H., Middleton, D.G., Mihovilovič, M., Müller, J., Müller, U., Olivenboim, M., Piasetzky, E., Pochodzalla, J., Ron, G., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Spreckels, R., Štajner, S., Strauch, S., Thiel, M., Tyukin, A., Weber, A., and Yaron, I.

Published
2020
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18. Comparison of recoil polarization in the [formula omitted] process for protons extracted from s and p shells

Author

Kolar, T., Paul, S.J., Brecelj, T., Achenbach, P., Böhm, R., Bosnar, D., Cline, E., Cohen, E.O., Distler, M.O., Esser, A., Gilman, R., Giusti, C., Hoek, M., Izraeli, D., Kegel, S., Kohl, Y., Korover, I., Lichtenstadt, J., Mardor, I., Merkel, H., Mihovilovič, M., Müller, J., Müller, U., Olivenboim, M., Piasetzky, E., Pochodzalla, J., Ron, G., Schlimme, B.S., Sfienti, C., Širca, S., Spreckels, R., Štajner, S., Strauch, S., Thiel, M., Weber, A., and Yaron, I.

Published
2020
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19. Comparison of recoil polarization in the Process for Protons Extracted From And Shells

Author

Kolar, T., Paul, S.J., Brecelj, T., Achenbach, P., Böhm, R., Bosnar, D., Cline, E., Cohen, E.O., Distler, M.O., Esser, A., Gilman, R., Giusti, C., Hoek, M., Izraeli, D., Kegel, S., Kohl, Y., Korover, I., Lichtenstadt, J., Mardor, I., Merkel, H., Mihovilovič, M., Müller, J., Müller, U., Olivenboim, M., Piasetzky, E., Pochodzalla, J., Ron, G., Schlimme, B.S., Sfienti, C., Širca, S., Spreckels, R., Štajner, S., Strauch, S., Thiel, M., Weber, A., and Yaron, I.

Abstract

We present the first measurements of the double ratio of the polarization-transfer components (Px′/Pz′)p/(Px′/Pz′)s for knock-out protons from the s and p shells in C12 measured by the C12(e→,e′p→) reaction in quasi-elastic kinematics. The data are compared to theoretical predictions in the relativistic distorted-wave impulse approximation. Our results show that the differences between s- and p-shell protons, observed when compared at the same initial momentum (missing momentum), largely disappear when the comparison is done at the same proton virtuality. We observe no difference in medium modifications between protons from the s and p shells with the same virtuality in spite of the large differences in the respective nuclear densities.

Published
2020

20. Measurements of the induced polarization in the quasi-elastic Process in Non-coplanar Kinematics

Author

Paul, S.J., Kolar, T., Brecelj, T., Achenbach, P., Arenhövel, H., Ashkenazi, A., Beričič, J., Böhm, R., Bosnar, D., Cline, E., Cohen, E.O., Debenjak, L., Distler, M.O., Esser, A., Friščić, I., Gilman, R., Giusti, C., Heilig, M., Hoek, M., Izraeli, D., Kegel, S., Klag, P., Kohl, Y., Korover, I., Lichtenstadt, J., Mardor, I., Merkel, H., Middleton, D.G., Mihovilovič, M., Müller, J., Müller, U., Olivenboim, M., Piasetzky, E., Pochodzalla, J., Ron, G., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Spreckels, R., Štajner, S., Strauch, S., Thiel, M., Tyukin, A., Weber, A., and Yaron, I.

Abstract

We report measurements of the induced polarization P→ of protons knocked out from $^{2}$H and $^{12}$C via the A(e,e′p→) reaction. We have studied the dependence of P→ on two kinematic variables: the missing momentum pmiss and the “off-coplanarity” angle ϕpq between the scattering and reaction planes. For the full 360° range in ϕpq, both the normal (Py) and, for the first time, the transverse (Px) components of the induced polarization were measured with respect to the coordinate system associated with the scattering plane. Px vanishes in coplanar kinematics, however in non-coplanar kinematics, it is on the same scale as Py.We find that the dependence on ϕpq is sine-like for Px and cosine-like for Py. For carbon, the magnitude of the induced polarization is especially large when protons are knocked out from the p3/2 shell at very small pmiss. For the deuteron, the induced polarization is near zero at small |pmiss|, and its magnitude increases with |pmiss|. For both nuclei such behavior is reproduced qualitatively by theoretical results, driven largely by the spin-orbit part of the final-state interactions. However, for both nuclei, sizeable discrepancies exist between experiment and theory.

Published
2020

22. In-beam tests of scintillating fibre detectors at MAMI and at GSI

Author

Achenbach, P., Ayerbe Gayoso, C., Bernauer, J.C., Böhm, R., Distler, M.O., Doria, L., Gómez Rodríguez de la Paz, M., Merkel, H., Müller, U., Nungesser, L., Pochodzalla, J., Sánchez Majos, S., Schlimme, B.S., Walcher, Th., Weinriefer, M., Debenjak, L., Potokar, M., Širca, S., Kavatsyuk, M., Lepyoshkina, O., Minami, S., Nakajima, D., Rappold, C., Saito, T.R., Schardt, D., Träger, M., Iwase, H., Ajimura, S., Sakaguchi, A., and Mizoi, Y.

Published
2008
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23. Beam-normal single spin asymmetry in elastic electron scattering off 28Si and 90Zr

Author

Esser, A., Thiel, M., Achenbach, P., Aulenbacher, K., Aulenbacher, S., Baunack, S., Bosnar, D., Caiazza, S., Christmann, M., Dehn, M., Distler, M.O., Doria, L., Eckert, P., Gorchtein, M., Gülker, P., Herrmann, P., Hoek, M., Kegel, S., Klag, P., Kreidel, H.-J., Littich, M., Lunkenheimer, S., Maas, F.E., Makek, M., Merkel, H., Mihovilovič, M., Müller, J., Müller, U., Pochodzalla, J., Schlimme, B.S., Spreckels, R., Tioukine, V., and Sfienti, C.

Published
2020
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24. Front-end electronics for the KAOS spectrometer at MAMI

Author

Achenbach, Patrick, Gayoso, C. Ayerbe, Bernauer, J.C., Bohm, R., Bosnar, D., Debenjak, L., Distler, M.O., de la Paz, M. Gomez Rodriguez, Makek M., Merkel, H., Muller, U., Nungesser, L., Pochodzalla, J., Potokar, M., Majos, S. Sanchez, Schlimme, B.S., Sirca, S., Walcher, Th., Weindel, K., Weinriefer, M., and Yoon, C.J.

Subjects
Electronic circuits -- Design and construction, Photoelectric multipliers -- Usage, Radiation warning systems -- Equipment and supplies, Business, Electronics, Electronics and electrical industries
Abstract

A new front-end electronics system has been developed for the electron arm tracking detectors in the KAOS spectrometer at the Mainz microtron MAMI. The signals of multi-anode photomultipliers are collected by 96-channel front-end boards, digitized by double-threshold discriminators and the signal time is picked up by F1 TDC chips. The system was designed to process more than 4,000 channels and to cope with the high electron flux in the spectrometer and the high count rate requirement of the detectors. A subset of 288 channels was installed and successfully used in the 2008 data taking period of the KAOS spectrometer. Index Terms--Double-threshold discriminator, front-end electronics, multi-anode photomultiplier.

Published
2009

25. Beam-normal single spin asymmetry in elastic electron scattering off Si and Zr

Author

Esser, A., Thiel, M., Achenbach, P., Aulenbacher, K., Aulenbacher, S., Baunack, S., Bosnar, D., Caiazza, S., Christmann, M., Dehn, M., Distler, M.O., Doria, L., Eckert, P., Gorchtein, M., Gülker, P., Herrmann, P., Hoek, M., Kegel, S., Klag, P., Kreidel, H.J., Littich, M., Lunkenheimer, S., Maas, F.E., Makek, M., Merkel, H., Mihovilovič, M., Müller, J., Müller, U., Pochodzalla, J., Schlimme, B.S., Spreckels, R., Tioukine, V., and Sfienti, C.

Abstract

We report on a new measurement of the beam-normal single spin asymmetry An in the elastic scattering of 570 MeV transversely polarized electrons off $^{28}$Si and $^{90}$Zr at Q2=0.04 GeV2/c2. The studied kinematics allow for a comprehensive comparison with former results on $^{12}$C. No significant mass dependence of the beam-normal single spin asymmetry is observed in the mass regime from $^{12}$C to $^{90}$Zr.

Published
2020

26. Quasi-elastic polarization-transfer measurements on the deuteron in anti-parallel kinematics

Author

Paul, S., Izraeli, D., Brecelj, T., Yaron, I., Achenbach, P., Arenhövel, H., Ashkenazi, A., Beričič, J., Böhm, R., Bosnar, D., Cline, E., Cohen, E.O., Debenjak, L., Distler, M.O., Esser, A., Friščić, I., Gilman, R., Heilig, M., Kegel, S., Klag, P., Kohl, Y., Kolar, T., Korover, I., Lichtenstadt, J., Mardor, I., Merkel, H., Middleton, D.G., Mihovilovič, M., Müller, J., Müller, U., Olivenboim, M., Piasetzky, E., Pochodzalla, J., Ron, G., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Štajner, S., Strauch, S., Thiel, M., Tyukin, A., and Weber, A.

Published
2019
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27. The influence of Fermi motion on the comparison of the polarization transfer to a proton in elastic [formula omitted] and quasi-elastic [formula omitted] scattering

Author

Paul, Sebouh, Brecelj, T., Arenhövel, H., Achenbach, P., Ashkenazi, A., Beričič, J., Böhm, R., Bosnar, D., Cohen, E.O., Debenjak, L., Distler, M.O., Esser, A., Friščić, I., Gilman, R., Izraeli, D., Kolar, T., Korover, I., Lichtenstadt, J., Mardor, I., Merkel, H., Middleton, D.G., Mihovilovič, M., Müller, U., Olivenboim, M., Piasetzky, E., Pochodzalla, J., Ron, G., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Štajner, S., Strauch, S., Thiel, M., Tyukin, A., Weber, A., and Yaron, I.

Published
2019
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28. The influence of Fermi motion on the comparison of the polarization transfer to a proton in elastic And Quasi-elastic Scattering

Author

Paul, S., Brecelj, T., Arenhövel, H., Achenbach, P., Ashkenazi, A., Beričič, J., Böhm, R., Bosnar, D., Cohen, E.O., Debenjak, L., Distler, M.O., Esser, A., Friščić, I., Gilman, R., Izraeli, D., Kolar, T., Korover, I., Lichtenstadt, J., Mardor, I., Merkel, H., Middleton, D.G., Mihovilovič, M., Müller, U., Olivenboim, M., Piasetzky, E., Pochodzalla, J., Ron, G., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Štajner, S., Strauch, S., Thiel, M., Tyukin, A., Weber, A., and Yaron, I.

Abstract

A comparison between polarization-transfer to a bound proton in quasi-free kinematics by the A(e→,e′p→) knockout reaction and that in elastic scattering off a free proton can provide information on the characteristics of the bound proton. In the past the reported measurements have been compared to those of a free proton with zero initial momentum. We introduce, for the first time, expressions for the polarization-transfer components when the proton is initially in motion and compare them to the $^{2}$H data measured at the Mainz Microtron (MAMI). We show the ratios of the transverse (Px) and longitudinal (Pz) components of the polarization transfer in H2(e→,e′p→)n, to those of elastic scattering off a “moving proton”, assuming the proton's initial (Fermi-motion) momentum equals the negative missing momentum in the measured reaction. We found that the correction due to the proton motion is up to 20% at high missing momentum. However the effect on the double ratio (Px/Pz)A(Px/Pz)H1 is largely canceled out, as shown for both $^{2}$H and $^{12}$C data. This implies that the difference between the resting- and the moving-proton kinematics is not the primary cause for the deviations between quasi-elastic and elastic scattering reported previously.

Published
2019

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

Author

Izraeli, D., Yaron, I., Schlimme, B.S., Achenbach, P., Arenhövel, H., Ashkenazi, A., Beričič, J., Böhm, R., Bosnar, D., Cohen, E.O., Distler, M.O., Esser, A., Friščić, I., Gilman, R., Korover, I., Lichtenstadt, J., Mardor, I., Merkel, H., Middleton, D.G., Mihovilovič, M., Müller, U., Olivenboim, M., Piasetzky, E., Pochodzalla, J., Ron, G., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Štajner, S., Strauch, S., Thiel, M., Tyukin, A., and Weber, A.

Published
2018
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30. Measurement of polarization-transfer to bound protons in carbon and its virtuality dependence

Author

Izraeli, D., Brecelj, T., Achenbach, P., Ashkenazi, A., Böhm, R., Cohen, E.O., Distler, M.O., Esser, A., Gilman, R., Kolar, T., Korover, I., Lichtenstadt, J., Mardor, I., Merkel, H., Mihovilovič, M., Müller, U., Olivenboim, M., Piasetzky, E., Ron, G., Schlimme, B.S., Schoth, M., Sfienti, C., Širca, S., Štajner, S., Strauch, S., Thiel, M., Weber, A., and Yaron, I.

Published
2018
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31. First measurement of proton's charge form factor at very low Q2 with initial state radiation

Author

Mihovilovič, M., Weber, A.B., Achenbach, P., Beranek, T., Beričič, J., Bernauer, J.C., Böhm, R., Bosnar, D., Cardinali, M., Correa, L., Debenjak, L., Denig, A., Distler, M.O., Esser, A., Ferretti Bondy, M.I., Fonvieille, H., Friedrich, J.M., Friščić, I., Griffioen, K., Hoek, M., Kegel, S., Kohl, Y., Merkel, H., Middleton, D.G., Müller, U., Nungesser, L., Pochodzalla, J., Rohrbeck, M., Sánchez Majos, S., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Štajner, S., Thiel, M., Tyukin, A., Vanderhaeghen, M., and Weinriefer, M.

Published
2017
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32. Polarization-transfer measurement to a large-virtuality bound proton in the deuteron

Author

Yaron, I., Izraeli, D., Achenbach, P., Arenhövel, H., Beričič, J., Böhm, R., Bosnar, D., Cohen, E.O., Debenjak, L., Distler, M.O., Esser, A., Friščić, I., Gilman, R., Korover, I., Lichtenstadt, J., Merkel, H., Middleton, D.G., Mihovilovič, M., Müller, U., Piasetzky, E., Pochodzalla, J., Ron, G., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Strauch, S., Thiel, M., Tyukin, A., and Weber, A.

Published
2017
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34. First measurement of proton's charge form factor at very low With Initial State Radiation

Author

Mihovilovič, M., Weber, A.B., Achenbach, P., Beranek, T., Beričič, J., Bernauer, J.C., Böhm, R., Bosnar, D., Cardinali, M., Correa, L., Debenjak, L., Denig, A., Distler, M.O., Esser, A., Ferretti Bondy, M.I., Fonvieille, H., Friedrich, J.M., Friščić, I., Griffioen, K., Hoek, M., Kegel, S., Kohl, Y., Merkel, H., Middleton, D.G., Müller, U., Nungesser, L., Pochodzalla, J., Rohrbeck, M., Sánchez Majos, S., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Štajner, S., Thiel, M., Tyukin, A., Vanderhaeghen, M., and Weinriefer, M.

Abstract

We report on a new experimental method based on initial-state radiation (ISR) in e–p scattering, which exploits the radiative tail of the elastic peak to study the properties of electromagnetic processes and to extract the proton charge form factor (GEp) at extremely small Q2. The ISR technique was implemented in an experiment at the three-spectrometer facility of the Mainz Microtron (MAMI). This led to a precise validation of radiative corrections far away from elastic line and provided first measurements of GEp for 0.001≤Q2≤0.004(GeV/c)2.

Published
2017

35. Ground-state binding energy of $^4_s$H from high-resolution decay-pion spectroscopy

Author

Schulz, F., Achenbach, P., Aulenbacher, S., Beričič, J., Bleser, S., Böhm, R., Bosnar, D., Correa, L., Distler, M.O., Esser, A., Fonvieille, H., Friščić, I., Fujii, Y., Fujita, M., Gogami, T., Kanda, H., Kaneta, M., Kegel, S., Kohl, Y., Kusaka, W., Margaryan, A., Merkel, H., Mihovilovič, M., Müller, U., Nagao, S., Nakamura, S.N., Pochodzalla, J., Sanchez Lorente, A., Schlimme, B.S., Schoth, M., Sfienti, C., Širca, S., Steinen, M., Takahashi, Y., Tang, L., Thiel, M., Tsukada, K., Tyukin, A., Weber, A., 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), A1, 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 Corpusculaire - Clermont-Ferrand (LPC), and Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Charge symmetry breaking, Hypernuclear mass spectroscopy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Mesonic weak decay
Abstract

International audience; A systematic study on the Λ ground state binding energy of hyperhydrogen HΛ4 measured at the Mainz Microtron MAMI is presented. The energy was deduced from the spectroscopy of mono-energetic pions from the two-body decays of hyperfragments, which were produced and stopped in a 9 Be target. First data, taken in the year 2012 with a high resolution magnetic spectrometer, demonstrated an almost one order of magnitude higher precision than emulsion data, while being limited by systematic uncertainties. In 2014 an extended measurement campaign was performed with improved control over systematic effects, increasing the yield of hypernuclei and confirming the observation with two independent spectrometers and two targets of different thicknesses. The analysis of these data is in agreement with the previously published value for the HΛ4 binding energy as well as with a consistent re-analysis of the 2012 data. When compared to the HeΛ4 binding energy from emulsion data, a large charge symmetry breaking effect in the A=4 hypernuclear system is confirmed.

Published
2016

36. Measurement of the Neutron Electric to Magnetic Form Factor Ratio at Q2=1.58 GeV2 Using the Reaction He−→3(e⃗ ,e′n)pp

Author

Schlimme, B.S., Achenbach, P., Ayerbe Gayoso, C. A., Bernauer, J. C., Böhm, R., Bosnar, D., Challand, T., Distler, M.O., Doria, L., Fellenberger, F., Fonvieille, H., Gómez Rodríguez, M., Grabmayr, P., Hehl, T., Heil, W., Kiselev, D., Krimmer, J., Makek, M., Merkel, H., Middleton, D. G., Müller, U., Nungesser, L., Ott B., A., Pochodzalla, J., Potokar, M., Sánchez Majos, S., Sargsian M., M., Sick, I., Širca, S., Weinriefer, M., Wendel, M., Yoon, J., Institut für Kernphysik, Johannes Gutenberg - Universität Mainz = Johannes Gutenberg University (JGU), Department of Physics [Zagreb], Faculty of Science [Zagreb], University of Zagreb-University of Zagreb, Department of Physics, University of Basel (Unibas), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Physikalisches Institut [Tübingen], Eberhard Karls Universität Tübingen = Eberhard Karls University of Tuebingen, Institut für Physik [Mainz], The Swiss Light Source (SLS) (SLS-PSI), Paul Scherrer Institute (PSI), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Jozef Stefan Institute [Ljubljana] (IJS), Florida International University [Miami] (FIU), University of Ljubljana, Johannes Gutenberg - Universität Mainz (JGU), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

International audience; A measurement of beam helicity asymmetries in the reaction He−→3(e⃗ ,e′n)pp is performed at the Mainz Microtron in quasielastic kinematics to determine the electric to magnetic form factor ratio of the neutron GnE/GnM at a four-momentum transfer Q2=1.58 GeV2. Longitudinally polarized electrons are scattered on a highly polarized He3 gas target. The scattered electrons are detected with a high-resolution magnetic spectrometer, and the ejected neutrons are detected with a dedicated neutron detector composed of scintillator bars. To reduce systematic errors, data are taken for four different target polarization orientations allowing the determination of GnE/GnM from a double ratio. We find μnGnE/GnM=0.250±0.058(stat)±0.017(syst).

Published
2013

37. Measurement of the Neutron Electric to Magnetic Form Factor Ratio at Q2=1.58 GeV2 Using the Reaction 3He→(e→, e′n)pp

Author

Schlimme, B.S., Achenbach, P., Ayerbe Gayoso, C., Bernauer, J.C., Böhm, R., Bosnar, Damir, Challand, Th., Distler, M.O., Doria, L., Fellenberger, F., Fonvieille, H., Gómez Rodríguez, M., Grabmayr, P., Hehl, T., Heil, W., Kiselev, D., Krimmer, J., Makek, Mihael, Merkel, H., Middleton, D.G., Müller, U., Nungesser, L., Ott, B.A., Pochodzalla, J., Potokar, M., Sánchez Majos, S., Sargsian, M.M., Sick, I., Širca, S., Weinriefer, M., Wendel, M., and Yoon, C.J.

Subjects
PRIRODNE ZNANOSTI. Fizika, elastic electron scattering, electromagnetic form factors, High Energy Physics::Experiment, protons and neutrons, Nuclear Experiment, NATURAL SCIENCES. Physics
Abstract

A measurement of beam helicity asymmetries in the reaction 3He⃗(e⃗, e′n)pp is performed at the Mainz Microtron in quasielastic kinematics to determine the electric to magnetic form factor ratio of the neutron GEn/GMn at a four-momentum transfer Q2=1.58 GeV2. Longitudinally polarized electrons are scattered on a highly polarized 3He gas target. The scattered electrons are detected with a high-resolution magnetic spectrometer, and the ejected neutrons are detected with a dedicated neutron detector composed of scintillator bars. To reduce systematic errors, data are taken for four different target polarization orientations allowing the determination of GEn/GMn from a double ratio. We find μnGEn/GMn=0.250±0.058(stat)±0.017(syst).

Published
2013

38. Reply to Comment on 'High-Precision Determination of the Electric and Magnetic Form Factors of the Proton'

Author

Bernauer, J.C., Achenbach, P., Ayerbe Gayoso, C., Bohm, R., Bosnar, Damir, Debenjak, L., Distler, M.O., Doria, L., Esser, A., Fonvieille, H., Friedrich, J.M., Friedrich, J., Gomez Rodriguez de la Paz, M., Makek, Mihael, Merkel, H., Middleton, D.G., Muller, U., Nungesser, L., Pochodzalla, J., Potokar, M., Sanchez Majos, S., Schlimme, B.S., Sirca, S., Walcher, Th., and Weinriefer, M.

Subjects
form factor, PRIRODNE ZNANOSTI. Fizika, electron scattering, proton, MAMI, FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment, NATURAL SCIENCES. Physics
Abstract

In arXiv:1108.3058v1 [nucl-ex], Arrington criticizes the Coulomb corrections we applied in the analysis of high precision form factor data (see Phys.Rev.Lett.105:242001, 2010, arXiv:1007.5076v3 [nucl-ex]). We show, by comparing different calculations cited in the Comment, that the criticism of the Comment neglects the large uncertainty of "more modern" TPE corrections. This uncertainty has also been seen in recent polarized measurements. We rerun our analysis using one of these calculations. The results show that the Comment exaggerates the quantitative effect at small Q^2., 1 page, 2 figure, To appear as a Reply Comment in Physical Review Letters

Published
2011

39. Strangeness production with KAOS at MAMI

Author

Achenbach, P., Ayerbe Gayoso, C., Bernauer, J.C., Bohm, R., Bosnar, Damir, Bosz, M., Debenjak, L., Distler, M.O., Esser, A., Friščić, Ivica, Gomez Rodrıguez, M., Grießinger, K., Jennewein, P., Makek, Mihael, Merkel, H., Muller, U., Nungesser, L., Pochodzalla1, J., Potokar, M., Saito, T.R., Sanchez Majos, S., Schlimme, B.S., Sirca, S., Walcher, Th., Weinriefer, M., and Yoon, C.

Subjects
High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, electron scattering, strangess in nuclei, High Energy Physics::Experiment, Nuclear Experiment
Abstract

In 2007 the Mainz Microtron MAMI has been upgraded to 1.5 GeV electron beam energy, crossing the energy threshold for open strangeness production. The strangeness quantum number, as carried by the strange quark, provides valuable information on the contribution of individual quark flavours to hadronic processes. Theoretically, the strange quark with its rest energy of order 150MeV is particularly interesting because it can neither be treated as a massless nor as a heavy quark. Experimentally, an instrument of central importance for the charged kaon electro-production off the proton or light nuclei at MAMI is the magnetic spectrometer Kaos that was installed recently and is now routinely operated by the A1 collaboration.

Published
2011

40. First measurements of Λ and Σ0 hyperons in elementary electroproduction at MAMI

Author

Achenbach P., Ayerbe Gayosoa, C., Bernauera, J.C., Bianchin, S., Bohm, R., Borodin, O., Bosnar, Damir, Bozkurt, V., Debenjak, L., Denig, A., Distler, M.O., Esser, A., Fonvieillee, H., Friščić, Ivica, Gokuzumb, B., Grießinger, K., Kim, E., Maas, F.E., Makek, Mihael, Merkel, H., Minami, S., Muller, U., Nakajima, D., Nungesser, L., Ozeltashenov, B., Pochodzalla, J., Potokar, M., Rappold, Ch., Saito, T.R., Sanchez Majos, S., Schlimme, B.S., Sirca, S., and Weinriefer, M.

Subjects
Nuclear Theory, Kaon, Electroproduction reactions, Missing mass spectroscopy, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Since 2008 the magnetic spectrometer Kaos, dedicated to the detection of charged kaons, is operating at the 1.5 GeV electron beam of MAMI at the Institut für Kernphysik in Mainz, Germany. The strangeness programme performed in 2008–9 is addressing some important issues in the field of elementary kaon photoelectro-production reactions. The identification of Λ and Σ0 hyperons in the missing mass spectra from kaon production off a liquid hydrogen target demonstrates the capability of the extended facility to perform strangeness electro-production spectroscopy at low momentum transfers Q2

Published
2010

41. First measurements of Lambda and Sigma0 hyperons in elementary electroproduction at MAMI

Author

Achenbach, P., Ayerbe Gayoso, C., Bernauer, J.C., Bianchin, S., Böhm, R., Borodina, O., Bosnar, D., Bozkurt, V., Debenjak, L., Denig, A., Distler, M.O., Essera, A., Fonvieille, H., Friščić, I., Göküzüm, B., Grießinger, K., Kim, E., Maas, F.E., Makek, M., Merkel, H., Minami, S., Müller, U., Nakajima, D., Nungesser, L., Özel-Tashenov, B., Pochodzalla, J., Potokar, M., Rappold, Ch., Saito, T.R., Sánchez Majos, S., Schlimme, B.S., Širca, S., Weinriefera, M., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and MAMI-A1

Subjects
Missing mass spectroscopy, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Electroproduction reactions, Kaon, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2009

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