10 results on '"Hasinoff, M.D."'
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2. New determination of the branching ratio of the structure dependent radiative →
- Author
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Kobayashi, A., Ito, H., Bianchin, S., Cao, T., Djalali, C., Dongwi, D.H., Gautam, T., Gill, D., Hasinoff, M.D., Horie, K., Igarashi, Y., Imazato, J., Kalantarians, N., Kawai, H., Kimura, S., Kodama, S., Kohl, M., Lu, H., Mineev, O., Monaghan, P., Shimizu, S., Tabata, M., Tanuma, R., Toyoda, A., Yamazaki, H., and Yershov, N.
- Abstract
The branching ratio of the structure dependent (SD) radiative K+→e+νeγ decay relative to that of the K+→e+νe(γ) decay including the internal bremsstrahlung (IB) process (Ke2(γ)) has been measured in the J-PARC E36 experiment using plastic scintillator/lead sandwich detectors, in contrast to the previous E36 measurement, which used a CsI(Tl) calorimeter. In the analysis, the effect of IB was also taken into account in the SD radiative decay as Ke2γ(γ)SD. By combining the new data with the previous E36 result after revision for the IB correction for Ke2γ(γ)SD, a new value Br(Ke2γ(γ)SD)/Br(Ke2(γ))=1.20±0.07 has been determined. This is consistent with a recent lattice QCD calculation, but larger than the expectation of Chiral Perturbation Theory (ChPT) at order O(p4) and the previous KLOE value. Using the method to relate form factor and branching ratio described in the KLOE paper, the present result is also consistent with the form factor prediction based on a gauged nonlocal chiral quark model, but larger than that from ChPT at order O(p6).
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- 2023
3. Measurement of structure dependent radiative K+ → e+νγ decays using stopped positive kaons
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Ito, H., primary, Kobayashi, A., additional, Bianchin, S., additional, Cao, T., additional, Djalali, C., additional, Dongwi, D.H., additional, Gautam, T., additional, Gill, D., additional, Hasinoff, M.D., additional, Horie, K., additional, Igarashi, Y., additional, Imazato, J., additional, Kalantarians, N., additional, Kawai, H., additional, Kimura, S., additional, Kodama, S., additional, Kohl, M., additional, Lu, H., additional, Mineev, O., additional, Monaghan, P., additional, Shimizu, S., additional, Strauch, S., additional, Tabata, M., additional, Tanuma, R., additional, Toyoda, A., additional, Yamazaki, H., additional, and Yershov, N., additional
- Published
- 2022
- Full Text
- View/download PDF
4. New solar axion search in CAST with $^4$He filling
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Arik, M., Aune, S., Barth, K., Belov, A., Bräuninger, H., Bremer, J., Burwitz, V., Cantatore, G., Carmona, J.M., Cetin, S.A., Collar, J.I., Da Riva, E., Dafni, T., Davenport, M., Dermenev, A., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Galán, J., García, J. A., Gardikiotis, A., Garza, J.G., Gazis, E.N., Geralis, T., Georgiopoulou, E., Giomataris, I., Gninenko, S., Gómez Marzoa, M., Hasinoff, M.D., Hoffmann, D.H.H., Iguaz, F.J., Irastorza, I.G., Jacoby, J., Jakovčić, K., Karuza, M., Kavuk, M., Krčmar, M., Kuster, M., Lakić, B., Laurent, J.M., Liolios, A., Ljubičić, A., Luzón, G., Neff, S., Niinikoski, T., Nordt, A., Ortega, I., Papaevangelou, T., Pivovaroff, M.J., Raffelt, G., Rodríguez, A., Rosu, M., Ruz, J., Savvidis, I., Shilon, I., Solanki, S.K., Stewart, L., Tomás, A., Vafeiadis, T., Villar, J., Vogel, J.K., Yildiz, S.C., and Zioutas, K.
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High Energy Physics - Experiment (hep-ex) ,Physics - Instrumentation and Detectors ,FOS: Physical sciences ,Instrumentation and Detectors (physics.ins-det) ,Particle Physics - Experiment ,High Energy Physics - Experiment - Abstract
The CERN Axion Solar Telescope (CAST) searches for $a\to\gamma$ conversion in the 9 T magnetic field of a refurbished LHC test magnet that can be directed toward the Sun. Two parallel magnet bores can be filled with helium of adjustable pressure to match the X-ray refractive mass $m_\gamma$ to the axion search mass $m_a$. After the vacuum phase (2003--2004), which is optimal for $m_a\lesssim0.02$ eV, we used $^4$He in 2005--2007 to cover the mass range of 0.02--0.39 eV and $^3$He in 2009--2011 to scan from 0.39--1.17 eV. After improving the detectors and shielding, we returned to $^4$He in 2012 to investigate a narrow $m_a$ range around 0.2 eV ("candidate setting" of our earlier search) and 0.39--0.42 eV, the upper axion mass range reachable with $^4$He, to "cross the axion line" for the KSVZ model. We have improved the limit on the axion-photon coupling to $g_{a\gamma}< 1.47\times10^{-10} {\rm GeV}^{-1}$ (95% C.L.), depending on the pressure settings. Since 2013, we have returned to vacuum and aim for a significant increase in sensitivity., Comment: CAST Collaboration 6 pages 3 figures
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- 2015
5. New solar axion search using the CERN Axion Solar Telescope with He4 filling
- Author
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Arik, M., Aune, S., Barth, K., Belov, A., Bräuninger, H., Bremer, J., Burwitz, V., Cantatore, G., Carmona, J.M., Cetin, S.A., Collar, J.I., Da Riva, E., Dafni, T., Davenport, M., Dermenev, A., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Galván, J., García, J.A., Gardikiotis, A., Garza, J.G., Gazis, E.N., Geralis, T., Georgiopoulou, E., Giomataris, I., Gninenko, S., Gómez Marzoa, M., Hasinoff, M.D., Hoffmann, D.H.H., Iguaz, F.J., Irastorza, I.G., Jacoby, J., Jakovcic, K., Karuza, M., Kavuk, M., Krcmar, M., Kuster, M., Lakic, B., Laurent, J.M., Liolios, A., Ljubicic, A., Luzón, G., Neff, S., Niinikoski, T., Nordt, A., Ortega, I., Papaevangelou, T., Pivovaroff, M.J., Raffelt, G., Rodríguez, A., Rosu, M., Ruz, J., Savvidis, I., Shilon, I., Solanki, S.K., Stewart, L., Tomás, A., Vafeiadis, T., Villar, J., Vogel, J.K., Yildiz, S.C., and Zioutas, K.
- Subjects
strong cp problem ,coherent conversion ,cast experiment ,magnetic-field ,invariance ,detectors ,photons - Abstract
The CERN Axion Solar Telescope (CAST) searches for a -> gamma conversion in the 9 T magnetic field of a refurbished LHC test magnet that can be directed toward the Sun. Two parallel magnet bores can be filled with helium of adjustable pressure to match the x-ray refractive mass m_gamma to the axion search mass m_a. After the vacuum phase (2003-2004), which is optimal for m_a less than or similar to 0.02 eV, we used He-4 in 2005-2007 to cover the mass range of 0.02-0.39 eV and He-3 in 2009-2011 to scan from 0.39 to 1.17 eV. After improving the detectors and shielding, we returned to He-4 in 2012 to investigate a narrow m_a range around 0.2 eV ("candidate setting" of our earlier search) and 0.39-0.42 eV, the upper axion mass range reachable with He-4, to "cross the axion line" for the KSVZ model. We have improved the limit on the axion-photon coupling to g_a_gamma < 1.47 x 10^(-10) GeV^(-1) (95% C.L.), depending on the pressure settings. Since 2013, we have returned to the vacuum and aim for a significant increase in sensitivity.
- Published
- 2015
6. Search for solar axions by the CERN axion solar telescope with He 3 buffer gas: Closing the hot dark matter gap
- Author
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Arik, M., Aune, S., Barth, K., Belov, A., Borghi, S., Bräuninger, H., Cantatore, G., Carmona, J.M., Cetin, S.A., Collar, J.I., Da Riva, E., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Friedrich, P., Galán, J., García, J.A., Gardikiotis, A., Garza, J.G., Gazis, E.N., Geralis, T., Georgiopoulou, E., Giomataris, I., Gninenko, S., Gómez, H., Gómez Marzoa, M., Gruber, E., Guthörl, T., Hartmann, R., Hauf, S., Haug, F., Hasinoff, M.D., Hoffmann, D.H.H., Iguaz, F.J., Irastorza, I.G., Jacoby, J., Jakovcic, K., Karuza, M., Königsmann, K., Kotthaus, R., Krcmar, M., Kuster, M., Lakic, B., Lang, P.M., Laurent, J.M., Liolios, A., Ljubicic, A., Luzón, G., Neff, S., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M.J., Raffelt, G., Riege, H., Rodríguez, A., Rosu, M., Ruz, J., Savvidis, I., Shilon, I., Silva, P.S., Solanki, S.K., Stewart, L., Tomás, A., Tsagri, M., Van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J.K., Yildiz, S.C., and Zioutas, K.
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Physics::Instrumentation and Detectors ,Astrophysics::Solar and Stellar Astrophysics ,Astrophysics::Earth and Planetary Astrophysics - Abstract
The CERN Axion Solar Telescope has finished its search for solar axions with 3He buffer gas, covering the search range 0.64 eV ¿ ma ¿ 1.17 eV. This closes the gap to the cosmological hot dark matter limit and actually overlaps with it. From the absence of excess x rays when the magnet was pointing to the Sun we set a typical upper limit on the axion-photon coupling of ga¿ ¿ 3.3 × 10-10 GeV-1 at 95% C.L., with the exact value depending on the pressure setting. Future direct solar axion searches will focus on increasing the sensitivity to smaller values of ga¿, for example by the currently discussed next generation helioscope International AXion Observatory.
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- 2014
7. Search for Solar Axions by the CERN Axion Solar Telescope with 3 He Buffer Gas: Closing the Hot Dark Matter Gap
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Arik, M., Aune, S., Barth, K., Belov, A., Borghi, S., Bräuninger, H., Cantatore, G., Carmona, J.M., Cetin, S.A., Collar, J.I., Da Riva, E., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Friedrich, P., Galán, J., García, J.A., Gardikiotis, A., Garza, J.G., Gazis, E.N., Geralis, T., Georgiopoulou, E., Giomataris, I., Gninenko, S., Gómez, H., Gómez Marzoa, M., Gruber, E., Guthörl, T., Hartmann, R., Hauf, S., Haug, F., Hasinoff, M.D., Hoffmann, D.H.H., Iguaz, F.J., Irastorza, I.G., Jacoby, J., Jakovčić, K., Karuza, M., Königsmann, K., Kotthaus, R., Krčmar, M., Kuster, M., Lakić, B., Lang, P.M., Laurent, J.M., Liolios, A., Ljubičić, A., Lozza, V., Luzón, G., Neff, S., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M.J., Raffelt, G., Riege, H., Rodríguez, A., Rosu, M., Ruz, J., Savvidis, I., Shilon, I., Silva, P.S., Solanki, S.K., Stewart, L., Tomás, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J.K., Yildiz, S.C., and Zioutas, K.
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Particle Physics - Experiment - Abstract
The CERN Axion Solar Telescope (CAST) has finished its search for solar axions with 3^He buffer gas, covering the search range 0.64 eV < m_a The CERN Axion Solar Telescope has finished its search for solar axions with He3 buffer gas, covering the search range 0.64 eV≲ma≲1.17
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- 2013
8. Search for chameleons with CAST
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Anastassopoulos, V., primary, Arik, M., additional, Aune, S., additional, Barth, K., additional, Belov, A., additional, Bräuninger, H., additional, Cantatore, G., additional, Carmona, J.M., additional, Cetin, S.A., additional, Christensen, F., additional, Collar, J.I., additional, Dafni, T., additional, Davenport, M., additional, Desch, K., additional, Dermenev, A., additional, Eleftheriadis, C., additional, Fanourakis, G., additional, Ferrer-Ribas, E., additional, Friedrich, P., additional, Galán, J., additional, García, J.A., additional, Gardikiotis, A., additional, Garza, J.G., additional, Gazis, E.N., additional, Geralis, T., additional, Giomataris, I., additional, Hailey, C., additional, Haug, F., additional, Hasinoff, M.D., additional, Hoffmann, D.H.H., additional, Iguaz, F.J., additional, Irastorza, I.G., additional, Jacoby, J., additional, Jakobsen, A., additional, Jakovčić, K., additional, Kaminski, J., additional, Karuza, M., additional, Kavuk, M., additional, Krčmar, M., additional, Krieger, C., additional, Krüger, A., additional, Lakić, B., additional, Laurent, J.M., additional, Liolios, A., additional, Ljubičić, A., additional, Luzón, G., additional, Neff, S., additional, Ortega, I., additional, Papaevangelou, T., additional, Pivovaroff, M.J., additional, Raffelt, G., additional, Riege, H., additional, Rosu, M., additional, Ruz, J., additional, Savvidis, I., additional, Solanki, S.K., additional, Vafeiadis, T., additional, Villar, J.A., additional, Vogel, J.K., additional, Yildiz, S.C., additional, Zioutas, K., additional, Brax, P., additional, Lavrentyev, I., additional, and Upadhye, A., additional
- Published
- 2015
- Full Text
- View/download PDF
9. Search for Solar Axions: CAST
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Lakić, Biljana, Andriamonje, S., Aune, S., Autiero, D., Avignone, F., Barth, K., Belov, A., Beltrán, B., Bräuninger, H., Carmona, J.M., Cebrián, S., Chesi, E., Collar, J.I., Creswick, R., Dafni, T., Davenport, M., Di Lella, L., Eleftheriadis, C., Englhauser, J., Fanourakis, G., Farach, H., Ferrer, E., Fischer, H., Franz, J., Friedrich, P., Geralis, T., Giomataris, I., Gninenko, S., Goloubev, N., Hartmann, R., Hasinoff, M.D., Heinsius, F.H., Hoffmann, D.H.H., Irastorza, I.G., Jacoby, J., Kang, D., Königsmann, K., Kotthaus, R., Krčmar, Milica, Kousouris, K., Kuster, M., Lasseur, C., Liolios, A., Ljubičić, Ante, Lutz, G., Luzón, G., Miller, D.W, Morales, A., Morales, J., Ortiz, A., Papaevangelou, T., Placci, A., Raffelt, G., Ruz, J., Riege, H., Sarsa, M.L., Savvidis, I., Serpico, P., Semertzidis, Y., Stewart, L., Vieira, J.D., Villar, J., Walckiers, L., Zachariadou, K., and Zioutas, K.
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Physics::Instrumentation and Detectors ,Physics ,High Energy Physics::Phenomenology ,solar axions ,axion-photon coupling - Abstract
The CERN Axion Solar Telescope (CAST) is searching for axions produced in the Sun´s core by the Primakoff process. CAST is using a decommissioned Large Hadron Collider (LHC) test magnet where axions could be converted back into X-rays with energies up to 10 keV. Analysis of the 2003 data showed no signal above background implying an upper limit for the axion-photon coupling constant g_(a gamma) < 1.16 × 10^(-10) GeV^(-1) at 95% C.L. for m_a < = 0.02 eV [1]. The higher quality 2004 data is presently under analysis. CAST Phase II is scheduled to start in late 2005. This will be the first step in extending CAST´s sensitivity to axion rest masses up to 1 eV.
- Published
- 2007
10. CAST search for sub-eV mass solar axions with 3He buffer gas
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Graduate School of Business & Public Policy (GSBPP), Arik, M., Aune, S., Barth, K., Belov, A., Borghi, S., Bräuninger, H., Cantatore, G., Carmona, J.M., Cetin, S.A., Collar, J.I., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Ezer, C., Fanourakis, G., Ferrer-Ribas, E., Friedrich, P., Galán, J., García, J.A., Gardikiotis, A., Gazis, E.N., Geralis, T., Giomataris, I., Gninenko, S., Gómez, H., Gruber, E., Guthörl, T., Hartmann, R., Haug, F., Hasinoff, M.D., Hoffmann, D.H.H., Iguaz, F.J., Irastorza, I.G., Jacoby, J., Jakovčić, K., Karuza, M., Königsmann, K., Kotthaus, R., Krčmar, M., Kuster, M., Lakić, B., Laurent, J.M., Liolios, A., Ljubičić, A., Lozza, V., Lutz, G., Luzón, G., Morales, J., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M.J., Raffelt, G., Rashba, T., Riege, H., Rodríguez, A., Rosu, M., Ruz, J., Savvidis, I., Silva, P.S., Solanki, S.K., Stewart, L., Tomás, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J.K., Yildiz, S.C., Zioutas, K.(CAST Collaboration), Graduate School of Business & Public Policy (GSBPP), Arik, M., Aune, S., Barth, K., Belov, A., Borghi, S., Bräuninger, H., Cantatore, G., Carmona, J.M., Cetin, S.A., Collar, J.I., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Ezer, C., Fanourakis, G., Ferrer-Ribas, E., Friedrich, P., Galán, J., García, J.A., Gardikiotis, A., Gazis, E.N., Geralis, T., Giomataris, I., Gninenko, S., Gómez, H., Gruber, E., Guthörl, T., Hartmann, R., Haug, F., Hasinoff, M.D., Hoffmann, D.H.H., Iguaz, F.J., Irastorza, I.G., Jacoby, J., Jakovčić, K., Karuza, M., Königsmann, K., Kotthaus, R., Krčmar, M., Kuster, M., Lakić, B., Laurent, J.M., Liolios, A., Ljubičić, A., Lozza, V., Lutz, G., Luzón, G., Morales, J., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M.J., Raffelt, G., Rashba, T., Riege, H., Rodríguez, A., Rosu, M., Ruz, J., Savvidis, I., Silva, P.S., Solanki, S.K., Stewart, L., Tomás, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J.K., Yildiz, S.C., and Zioutas, K.(CAST Collaboration)
- Abstract
The CERN Axion Solar Telescope (CAST) has extended its search for solar axions by using 3He as a buffer gas. At T=1.8 K this allows for larger pressure settings and hence sensitivity to higher axion masses than our previous measurements with 4He. With about 1 h of data taking at each of 252 different pressure settings we have scanned the axion mass range 0.39 eV < m_a < 0.64 eV. From the absence of excess X-rays when the magnet was pointing to the Sun we set a typical upper limit on the axion-photon coupling of g_ag < 2.3 x 10^{-10} GeV^{-1} at 95% CL, the exact value depending on the pressure setting. KSVZ axions are excluded at the upper end of our mass range, the first time ever for any solar axion search. In future we will extend our search to m_a < 1.15 eV, comfortably overlapping with cosmological hot dark matter bounds.
- Published
- 2012
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