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1. Searching for New Physics with DarkLight at the ARIEL Electron-Linac

Author

The DarkLight Collaboration, Cline, E., Corliss, R., Bernauer, J. C., Alarcon, R., Baartman, R., Benson, S., Bessuille, J., Ciarniello, D., Christopher, A., Colon, A., Deconinck, W., Dehmelt, K., Deshpande, A., Dilling, J., Dongwi, D. H., Fisher, P., Gautam, T., Gericke, M., Hasell, D., Hasinoff, M., Ihloff, E., Johnston, R., Kanungo, R., Kelsey, J., Kester, O., Kohl, M., Korover, I., Laxdal, R., Lee, S., Li, X., Ma, C., Mahon, A., Martin, J. W., Milner, R., Moore, M., Moran, P., Nazeer, J., Pachal, K., Patel, T., Planche, T., Rathnayake, M., Suresh, M., Vidal, C., Wang, Y., and Yen, S.

Subjects
Physics - Instrumentation and Detectors, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The search for a dark photon holds considerable interest in the physics community. Such a force carrier would begin to illuminate the dark sector. Many experiments have searched for such a particle, but so far it has proven elusive. In recent years the concept of a low mass dark photon has gained popularity in the physics community. Of particular recent interest is the $^8$Be and $^4$He anomaly, which could be explained by a new fifth force carrier with a mass of 17 MeV/$c^2$. The proposed DarkLight experiment would search for this potential low mass force carrier at ARIEL in the 10-20 MeV e$^+$e$^-$ invariant mass range. This proceeding will focus on the experimental design and physics case of the DarkLight experiment., Comment: 7 pages, 4 figures, to be submitted as part of the proceedings on "New Scientific Opportunities with the TRIUMF ARIEL e-linac"

Published
2022
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2. New determination of the branching ratio of the structure dependent radiative $K^{+} \to e^{+} ν_{e} γ$ decay

Author

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.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences
Abstract

The branching ratio of the structure dependent (SD) radiative $K^{+} \to e^{+} ν_{e} γ$ decay relative to that of the $K^+\rightarrow e^+ ν_{e} (γ)$ decay including the internal bremsstrahlung (IB) process ($K_{e2(γ)}$) has been measured in the J-PARC E36 experiment using plastic scintillator/lead sandwich detectors. In the analysis, the effect of IB was also taken into account in the SD radiative decay as $K_{e2γ(γ)}^{\rm SD}$. By combining the new data with the previously reported result of the E36 experiment using a CsI(Tl) calorimeter after revision for the IB correction for $K_{e2γ(γ)}^{\rm SD}$, a new value $Br(K_{e2γ(γ)}^{\rm SD})/Br(K_{e2(γ)})=1.20\pm0.07$ has been determined, which is consistent with a recent lattice QCD calculation, but larger than the expectation of Chiral Perturbation Theory (ChPT) at order $O(p^4)$ and the previous KLOE value. Also, using the method to relate form factor and branching ratio described in the KLOE paper, the present result is consistent with the form factor prediction based on a gauged nonlocal chiral quark model, but larger than ChPT at order $O(p^6)$., 19 pages

Published
2022
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3. First results of the CAST-RADES haloscope search for axions at 34.67 $��$eV

Author

Melc��n, A. ��lvarez, Cuendis, S. Arguedas, Baier, J., Barth, K., Br��uniger, H., Calatroni, S., Cantatore, G., Caspers, F., Castel, J. F, Cetin, S. A., Cogollos, C., Dafni, T., Davenport, M., Dermenev, A., Desch, K., D��az-Morcillo, A., D��brich, B., Fischer, H., Funk, W., Gallego, J. D, Barcel��, J. M Garc��a, Gardikiotis, A., Garza, J., Gimeno, B., Gninenko, S., Golm, J., Hasinoff, M., Hoffmann, D. H. H., Irastorza, I. G., Jakov��i��, K., Kaminski, J., Karuza, M., Laki��, B., Laurent, J. M, Lozano-Guerrero, A., Luz��n, G., Malbrunot, C., Maroudas, M., Miralda-Escud��, J., Mirallas, H., Miceli, L., Navarro, P., Ozbey, A., ��zbozduman, K., Garay, C. Pe��a, Pivovaroff, M., Redondo, J., Ruz, J., Ch��liz, E. Ruiz, Schmidt, S., Schumann, M., Semertzidis, Y., Solanki, S. K, Stewart, L., Tsagris, I., Vogel, T. Vafeiadis J. K., Widmann, E., Wuensch, W., and Zioutas, K.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences
Abstract

We present results of the Relic Axion Dark-Matter Exploratory Setup (RADES), a detector which is part of the CERN Axion Solar Telescope (CAST), searching for axion dark matter in the 34.67$��$eV mass range. A radio frequency cavity consisting of 5 sub-cavities coupled by inductive irises took physics data inside the CAST dipole magnet for the first time using this filter-like haloscope geometry. An exclusion limit with a 95% credibility level on the axion-photon coupling constant of g$_{a��}\gtrsim 4\times10^{-13} \text{GeV}^{-1}$ over a mass range of 34.6738 $��$eV < $m_a$ < 34.6771 $��$eV is set. This constitutes a significant improvement over the current strongest limit set by CAST at this mass and is at the same time one of the most sensitive direct searches for an axion dark matter candidate above the mass of 25 $��$eV. The results also demonstrate the feasibility of exploring a wider mass range around the value probed by CAST-RADES in this work using similar coherent resonant cavities., 14 pages, 9 figures. Accepted for publication in JHEP. Minor changes done compared to the previous version

Published
2021
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4. Performance test of a lead-glass counter for the J-PARC E36 experiment

Author

Bianchin, S., Djalali, C., Gill, D., Jiang, J., Hasinoff, M., Ivashkin, A., Kohl, M., Pywell, R., Strauch, S., Miyazaki, Yohei, Shimizu, Suguru, Horie, Keito, Igarashi, Yoichi, Imazato, Jun, Narikawa, Reiya, Tabata, Makoto, Toyoda, Akihisa, Yamazaki, Hirohito, and Yoshioka, Tamaki

Subjects
Physics, Nuclear and High Energy Physics, Muon, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, 010403 inorganic & nuclear chemistry, 01 natural sciences, Particle identification, Charged particle, 0104 chemical sciences, Nuclear physics, Kaon decay, Lead glass, visual_art, 0103 physical sciences, visual_art.visual_art_medium, High Energy Physics::Experiment, Lead-glass Cherenkovcounter, J-PARC, Instrumentation, Beam (structure), Cherenkov radiation, Lepton
Abstract

著者人数: 19名, Accepted: 2015-01-09, 資料番号: SA1150059000

Published
2015
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5. Search for T-violating transverse muon polarization in K+->pi(0)mu(+)nu decay

Author

Abe, M, Aoki, M, Arai, I, Asano, Y, Baker, T, Blecher, M, Chapman, MD, Depommier, P, Grigorjev, M, Hasinoff, M, Horie, K, Huang, H, Igarashi, Y, Ikeda, T, Imazato, J, Ivashkin, A, Kang, J, Khabibullin, M, Khotjantsev, A, Kudenko, Y, Kuno, Y, Lee, J, Levchenko, A, MacDonald, J, and Marlow, DR

Abstract

An experiment searching for a T-violating transverse muon polarization (Pr) in K+ --> pi (0)mu (+)nu decay is underway at the 12-GeV proton synchrotron at KEK (KEK-PS). This search is sensitive to new mechanisms of T or CP violation beyond the Standard Model. The expected sensitivity from 1996-98 data is presented based on the published result from 1996-97 data and the new result from 1998 data.

Published
2016

7. Search for T-violating transverse muon polarization in the K+->pi(0)mu(+)nu decay

Author

Abe, M, Aliev, M, Anisimovsky, V, Aoki, M, Asano, Y, Baker, T, Blecher, M, Depommier, P, Hasinoff, M, Horie, K, Igarashi, Y, Imazato, J, Ivashkin, A, Khabibullin, M, Khotjantsev, A, Kudenko, Y, Kuno, Y, Lee, K, Levchenko, A, Lim, G, Macdonald, J, Mineev, O, Okorokova, N, Rangacharyulu, C, and Shimizu, S

Published
2016

8. New result on measurement of T-violating muon polarization in K-mu 3 decay

Author

Abe, M, Aoki, M, Arai, I, Asano, Y, Baker, T, Blecher, M, Chapman, MD, Dementyev, D, Depommier, P, Grigoriev, M, Gumplinger, P, Hasinoff, M, Henderson, R, Horie, K, Hou, W, Huang, H, Igarashi, Y, Ikeda, T, Imazato, J, Ivashkin, A, Kang, J, Keil, W, Khabibullin, M, Khotyantsev, A, and Kudenko, Y

Abstract

A measurement of the transverse mu (+) polarization, P-T, in K+ --> pi (0)mu (+)nu decay was performed using stopped kaons. For 1996-1997 data the results are P-T = -0.0042 +/- 0.0049(stat) +/- 0.0009(syst) and Im(xi) = -0.013 +/- 0.016(stat)+/- 0.003(syst), where Im(xi) is T-violating physics parameter.

Published
2016

11. Test of time reversal invariance in K-mu 3 decay

Author

Kuno, Y, Abe, M, Aoki, M, Arai, I, Asano, Y, Baker, T, Blecher, M, Chapman, MD, Dementyev, D, Depommier, P, Grigorjev, M, Gumplinger, P, Hasinoff, M, Henderson, R, Horie, K, Hou, W, Huang, H, Igarashi, Y, Ikeda, T, Imazato, J, Ivashkin, A, Kang, J, Keil, W, Khabibullin, M, and Khotjantsev, A

Abstract

An experiment E246 at the 12-GeV proton synchrotron at KEK (KEK-PS), which is searching for the T-violating transverse muon polarization (P-mu(perpendicular to)) in K+ --> pi (0)mu (+)nu decay, is described. The search is sensitive to new mechanisms of T or CP violation beyond the Standard Model. The initial results of P-mu(perpendicular to) = -0.0042+/-0.0049(stat.)+/-0.0009(syst.) and the T-violating parameter Im(xi) = -0.013+/- 0.016(stat.) +/- 0.003(syst.) were determined from the data taken in 1996 and 1997.

Published
2016

12. Further search for T-violation in the decay K+ -> pi(0)mu(+)nu

Author

Abe, M, Aliev, M, Anisimovsky, V, Aoki, M, Asano, Y, Baker, T, Blecher, M, Depommier, P, Hasinoff, M, Horie, K, Igarashi, Y, Imazato, J, Ivashkin, A, Khabibullin, M, Khotjantsev, A, Kudenko, Y, Kuno, Y, Lee, K, Levchenko, A, Lim, G, Macdonald, J, Mineev, O, Okorokova, N, Rangacharyulu, C, and Shimizu, S

Abstract

A new result for the transverse mu(+) polarization, P-T, in the decay K+ --> pi(0)mu+nu has been obtained in the KEK E246 experiment. Combined with our earlier result, P-T = (-1.12 +/- 2.17(stat) +/- 0.90(syst)) X 10(-3) and Im(xi) = (-0.28 +/- 0.69(stat) +/- 0.30(syst)) X 10(-2), which are consistent with no T-violation.

Published
2016
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13. Measurement of K+→π0μ+νγ decay using stopped kaons

Author

Shimizu, S., Horie, K., Aliev, M.A., Asano, Y., Baker, T., Depommier, P., Hasinoff, M., Igarashi, Y., Imazato, J., Ivashkin, A.P., Khabibullin, M.M., Khotjantsev, A.N., Kudenko, Y.G., Levchenko, A.S., Lim, G.Y., Macdonald, J.A., Mineev, O.V., Rangacharyulu, C., and Sawada, S.

Subjects
Nuclear and High Energy Physics
Published
2006
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14. A kinematically complete measurement of $K^+ \to \pi^+ \pi^0 \pi^0$ decays

Author

Shin, Yh, Abe, M., Aoki, M., Arai, I., Asano, Y., Baker, T., Blecher, M., Chapman, Md, Dementyev, D., Depommier, P., Grigorjev, M., Gumplinger, P., Hasinoff, M., Henderson, R., Horie, K., Hou, Ws, Hsuan-Cheng Huang, Igarashi, Y., Ikeda, T., Ivashkin, A., Imazato, J., Lee, Jm, Lee, Ks, Lim, Gy, Kang, Jh, Keil, W., Khabibullin, M., Khotjantsev, A., Kudenko, Y., Kuno, Y., Macdonald, Ja, Mindas, Cr, Mineev, O., Rangacharyulu, C., Sahu, Sk, Sekikawa, S., Shimizu, Hm, Shimizu, S., Shibata, K., Shin, Ym, Sim, Ks, Suzuki, A., Tashiro, T., Watanabe, A., Wright, D., Yokoi, T., and Collaboration, Kek-Ps E.

Subjects
Physics, Particle physics, Quadratic equation, Physics and Astronomy (miscellaneous), Pi, Frame work, Engineering (miscellaneous), Polynomial expansion
Abstract

In a kinematically complete setting, the $K^+ \to \pi^+ \pi^0 \pi^0$ decays of stopped $K^+$ were measured. In the frame work of the Weinberg polynomial expansion, the coefficients up to quadratic terms were deduced. The results are in good agreement with previous measurements and consistent with CP conservation expectations. The empirical $\Delta I=1/2$ rule is violated.

Published
2000
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15. CAST solar axion search with 3^He buffer gas: Closing the hot dark matter gap

Author

Arik, M., Aune, S., Barth, K., Belov, A., Borghi, S., Brauninger, 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., Galan, J., Garcia, J. A., Gardikiotis, A., Garza, J. G., Gazis, E. N., Geralis, T., Georgiopoulou, E., Giomataris, I., Gninenko, S., Gomez, H., Marzoa, M. Gomez, Gruber, E., Guthorl, 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., Konigsmann, K., Kotthaus, R., Krcmar, M., Kuster, M., Lakic, B., Lang, P. M., Laurent, J. M., Liolios, A., Ljubicic, A., Lozza, V., Luzon, G., Neff, S., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Riege, H., Rodriguez, A., Rosu, M., Ruz, J., Savvidis, I., Shilon, I., Silva, P. S., Solanki, S. K., Stewart, L., Tomas, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J. K., Yildiz, S. C., and Zioutas, K.

Subjects
High Energy Physics - Experiment (hep-ex), Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences, Astrophysics::Earth and Planetary Astrophysics, Instrumentation and Detectors (physics.ins-det), Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), High Energy 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, 5 pages, 2 figures. Last version uploaded

Published
2013
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16. Precise measurement of parity violation in polarized muon decay

Author

TWIST Collaboration, Bueno, J. F., Bayes, R., Davydov, Yu. I., Depommier, P., Faszer, W., Gagliardi, C. A., Gaponenko, A., Gill, D. R., Grossheim, A., Gumplinger, P., Hasinoff, M. D., Henderson, R. S., Hillairet, A., Hu, J., Koetke, D. D., MacDonald, R. P., Marshall, G. M., Mathie, E. L., Mischke, R. E., Olchanski, K., Olin, A., Openshaw, R., Poutissou, J. -M., Poutissou, R., Selivanov, V., Sheffer, G., Shin, B., Stanislaus, T. D. S., Tacik, R., and Tribble, R. E.

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, media_common.quotation_subject, Electroweak interaction, FOS: Physical sciences, Parity (physics), Weak interaction, Asymmetry, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Pion, High Energy Physics::Experiment, Twist, media_common
Abstract

We present a new high precision measurement of parity violation in the weak interaction, using polarized muon decay. The TWIST collaboration has measured $P_\mu^\pi \xi$, where $P_\mu^\pi$ is the polarization of the muon in pion decay and $\xi$ describes the intrinsic asymmetry in muon decay. We find $P_\mu^\pi \xi = 1.00084 \pm 0.00029\,(\textrm{stat.})_{-0.00063}^{+0.00165}\,(\textrm{syst.})$, in good agreement with the standard model prediction of $P_\mu^\pi=\xi=1$. Our result is a factor of 7 more precise than the pre-TWIST value, setting new limits in left-right symmetric electroweak extensions to the standard model., Comment: 18 pages, 12 figures, published in Phys. Rev. D

Published
2011
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17. New Experimental Constraints for the Standard Model from Muon Decay

Author

Ryan Bayes, Bueno, J. F., Hillairet, A., Davydov, Yu I., Depommier, P., Faszer, W., Gagliardi, C. A., Gaponenko, A., Gill, D. R., Grossheim, A., Gumplinger, P., Hasinoff, M. D., Henderson, R. S., Hu, J., Koetke, D. D., Macdonald, R. P., Marshall, G., Mathie, E. L., Mischke, R. E., Olchanski, K., Olin, A., Openshaw, R., Poutissou, J. M., Poutissou, R., Selivanov, V., Sheffer, G., Shin, B., Stanislaus, T. D. S., Tacik, R., and Tribble, R. E.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, High Energy Physics::Experiment, High Energy Physics - Experiment
Abstract

The TWIST Collaboration has completed a new measurement of the energy-angle spectrum of positrons from the decay of highly polarized muons. A simultaneous measurement of the muon decay parameters {\rho}, {\delta}, and (P_{\mu}){\xi} tests the Standard Model (SM) in a purely leptonic process and provides improved limits for relevant extensions to the SM. Specifically, for the generalized left-right symmetric model |(g_R/g_L){\zeta}| 578 GeV/c^2, both 90% C.L.

Published
2010
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18. Blind analysis results of the TWIST experiment

Author

Hillairet, A., Bayes, R., Bueno, J. F., Davydov, Y. I., Depommier, P., Faszer, W., Fujiwara, M. C., Gagliardi, C. A., Gaponenko, A., Grossheim, A., Gill, D. R., Gumplinger, P., Hasinoff, M. D., Henderson, R. S., Hu, J., Koetke, D. D., MacDonald, R. P., Marshall, G. M., Mathie, E. W., Mischke, R. E., Olchanski, K., Olin, A., Openshaw, R., Poutissou, J. -M., Poutissou, R., Selivanov, V., Sheffer, G., Shin, B., Stanislaus, T. D. S., Tacik, R., and Tribble, R. E.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, High Energy Physics::Experiment, High Energy Physics - Experiment
Abstract

The TRIUMF Weak Interaction Symmetry Test (TWIST) experiment was designed to test the standard model at high precision in the purely leptonic decay of polarized muons. A general four-fermion interaction model is used to describe the muon decay. TWIST measures three of the four muon decay parameters of this model, $\rho$, $\delta$ and $P_{\mu}^{\pi} \xi$, from the shape of the momentum-angle spectrum. The results of this model independent approach are compared to the standard model predictions and used to constrain new physics. Our collaboration has finalized the blind analysis of the final experimental data taken in 2006 and 2007. This analysis mostly reached our goal of a precision of an order of magnitude improvement over the pre-TWIST measurements., Comment: 6 pages, 3 figures, proceedings for the Lake Louise Winter Institute 2010

Published
2010
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19. A Precision Measurement of the Muon Decay Parameters $��$ and $��$

Author

TWIST Collaboration, MacDonald, R. P., Bayes, R., Bueno, J., Davydov, Yu. I., Depommier, P., Faszer, W., Fujiwara, M. C., Gagliardi, C. A., Gaponenko, A., Gill, D. R., Grossheim, A., Gumplinger, P., Hasinoff, M. D., Henderson, R. S., Hillairet, A., Hu, J., Jamieson, B., Kitching, P., Koetke, D. D., Marshall, G. M., Mathie, E. L., Mischke, R. E., Musser, J. R., Nozar, M., Olchanski, K., Olin, A., Openshaw, R., Poutissou, J. -M., Poutissou, R., Quraan, M. A., Selivanov, V., Sheffer, G., Shin, B., Stanislaus, T. D. S., Tacik, R., and Tribble, R. E.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex)
Abstract

The TWIST collaboration has performed new measurements of two of the parameters that describe muon decay: $��$, which governs the shape of the overall momentum spectrum, and $��$, which governs the momentum dependence of the parity-violating decay asymmetry. This analysis gives the results $��=0.75014\pm 0.00017(\text{stat})\pm 0.00044(\text{syst})\pm 0.00011(��)$, where the last uncertainty arises from the correlation between $��$ and the decay parameter $��$, and $��= 0.75067\pm 0.00030(\text{stat})\pm 0.00067(\text{syst})$. These are consistent with the value of 3/4 given for both parameters in the Standard Model of particle physics, and are a factor of two more precise than the measurements previously published by TWIST. A new global analysis of all available muon decay data incorporating these results is presented. Improved lower and upper limits on the decay parameter $P_��^����$ of $0.99524 < P_��^����\leq ��< 1.00091$ at 90% confidence are determined, where $P_��^��$ is the polarization of the muon when it is created during pion decay, and $��$ governs the muon decay asymmetry. These results set new model-independent constraints on the possible weak interactions of right-handed particles. Specific implications for left-right symmetric models are discussed., 14 pages, 14 figs, accepted for publication in Phys. Rev. D

Published
2008
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20. Test of isospin symmetry via low energy $^1$H($��^-$,$��^o$)$n$ charge exchange

Author

Jia, Y., Gorringe, T. P., Hasinoff, M. D., Kovash, M. A., Ojha, M., Pavan, M. M., Tripathi, S., and Zolnierczuk, P. A.

Subjects
Nuclear Theory, FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

We report measurements of the $��^- p \to ��^o n$ differential cross sections at six momenta (104-143 MeV/c) and four angles (0-40 deg) by detection of $��$-ray pairs from $��^o \to ����$ decays using the TRIUMF RMC spectrometer. This region exhibits a vanishing zero-degree cross section from destructive interference between s-- and p--waves, thus yielding special sensitivity to pion-nucleon dynamics and isospin symmetry breaking. Our data and previous data do not agree, with important implications for earlier claims of large isospin violating effects in low energy pion-nucleon interactions., 5 pages, 3 figures, submitted to Physical Review Letters

Published
2008
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21. Probing eV-scale axions with CAST

Author

CAST Collaboration, Arik, E., Aune, S., Autiero, D., Barth, K., Belov, A., Beltr��n, B., Borghi, S., Bourlis, G., Boydag, F. S., Br��uninger, H., Carmona, J. M., Cebri��n, S., Cetin, S. A., Collar, J. I., Dafni, T., Davenport, M., Di Lella, L., Dogan, O. B., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Fischer, H., Friedrich, P., Franz, J., Gal��n, J., Geralis, T., Giomataris, I., Gninenko, S., G��mez, H., Hartmann, R., Hasinoff, M., Heinsius, F. H., Hikmet, I., Hoffmann, D. H. H., Irastorza, I. G., Jacoby, J., Jakov��i��, K., Kang, D., K��nigsmann, K., Kotthaus, R., Kr��mar, M., Kousouris, K., Kuster, M., Laki��, B., Lasseur, C., Liolios, A., Ljubi��i��, A., Lutz, G., Luz��n, G., Miller, D., Morales, J., Niinikoski, T., Nordt, A., Ortiz, A., Papaevangelou, T., Pivovaroff, M. J., Placci, A., Raffelt, G., Riege, H., Rodr��guez, A., Ruz, J., Savvidis, I., Semertzidis, Y., Serpico, P., Soufli, R., Stewart, L., van Bibber, K., Villar, J., Vogel, J., Walckiers, L., Zioutas, K., Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, TR3959, and Belirlenecek

Subjects
Physics, Particle physics, Helioscope, Photon, 010308 nuclear & particles physics, Axions, High Energy Physics::Phenomenology, Buffer gas, Phase (waves), FOS: Physical sciences, Astronomy and Astrophysics, Coupling (probability), 01 natural sciences, High Energy Physics - Experiment, Pseudoscalar, High Energy Physics - Experiment (hep-ex), dark matter, axions, solar axions, coherent conversion, magnetic-field, search, bounds, telescope, particles, detector, photons, mass, 0103 physical sciences, Dark Matter, 010306 general physics, CERN Axion Solar Telescope, Axion, Particle Physics - Experiment
Abstract

We have searched for solar axions or other pseudoscalar particles that couple to two photons by using the CERN Axion Solar Telescope (CAST) setup. Whereas we previously have reported results from CAST with evacuated magnet bores (Phase I), setting limits on lower mass axions, here we report results from CAST where the magnet bores were filled with \hefour gas (Phase II) of variable pressure. The introduction of gas generated a refractive photon mass $m_\gamma$, thereby achieving the maximum possible conversion rate for those axion masses \ma that match $m_\gamma$. With 160 different pressure settings we have scanned \ma up to about 0.4 eV, taking approximately 2 h of data for each setting. 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 $\gag\lesssim 2.17\times 10^{-10} {\rm GeV}^{-1}$ at 95% CL for $\ma \lesssim 0.4$ eV, the exact result depending on the pressure setting. The excluded parameter range covers realistic axion models with a Peccei-Quinn scale in the neighborhood of $f_{\rm a}\sim10^{7}$ GeV. Currently in the second part of CAST Phase II, we are searching for axions with masses up to about 1.2 eV using \hethree as a buffer gas., Comment: 18 pages, 7 figures. Revised version of the paper after referee's comments. Main changes on the gas section

Published
2008
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22. Results on axion physics from the CAST Experiment at CERN

Author

Eleftheriadis, Christos, Andriamonje, Samuel A, Aune, S, Barth, K, Belov, A, Beltran, B, Bräuninger, H, Carmona, J, Cebrián, S, Collar, J I, Dafni, T, Davenport, M, Di Lella, L, Englhauser, J, Fanourakis, G K, Ferrer-Ribas, E, Fischer, H, Franz, J, Friedrich, P, Geralis, T, Giomataris, Ioanis, Gninenko, S, Gomez, H, Hasinoff, M, Heinsius, F H, Hoffmann, D H H, Irastorza, I G, Jacoby, J, Jakovcic, K, Kang, D, Königsmann, K C, Kotthaus, R, Krcmar, M, Kousouris, K, Kuster, M, Laki, B, Lasseur, C, Liolios, A, Ljubicic, cA, Lutz, G, Luzón, G, Miller, D, Morales, A, Morales, J, Nordt, A, Ortiz, A, Papaevangelou, T, Placci, A, Raffelt, G, Riege1, H, Rodríguez, A, Ruz, J, Savvidis, I, Semertzidis, Y K, Serpico, Pasquale Dario, Stewart, L, Villar, J, Vogel, J, Walckiers, L, and Zioutas, K

Subjects
High Energy Physics::Theory, High Energy Physics - Experiment (hep-ex), Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, FOS: Physical sciences, Particle Physics - Experiment, High Energy Physics - Experiment
Abstract

Axions are expected to be produced in the sun via the Primakoff process. They may be detected through the inverse process in the laboratory, under the influence of a strong magnetic field, giving rise to X-rays of energies in the range of a few keV. Such an Axion detector is the CERN Axion Solar Telescope (CAST), collecting data since 2003. Results have been published, pushing the axion-photon coupling g$_{a\gamma}$ below the 10$^{-10}$ GeV$^{-1}$ limit at 95% CL, for axion masses less than 0.02 eV. This limit is nearly an order of magnitude lower than previous experimental limits and surpassed for the first time limits set from astrophysical arguments based on the energy-loss concept. The experiment is currently exploring axion masses in the range of 0.02 eV $< m_a, Comment: 13 pages, 5 figures, presented in the conference "Les Rencontres de Physique de la Vallee d'Aoste, La Thuile, 4 - 10 March 2007, Italy"

Published
2007
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23. Measurement of P_{mu}xi in Polarized Muon Decay

Author

TWIST Collaboration, Jamieson, B., Bayes, R., Davydov, Yu. I., Depommier, P., Doornbos, J., Faszer, W., Fujiwara, M. C., Gagliardi, C. A., Gaponenko, A., Gill, D. R., Gumplinger, P., Hasinoff, M. D., Henderson, R. S., Hu, J., Kitching, P., Koetke, D. D., Macdonald, J. A., MacDonald, R. P., Marshall, G. M., Mathie, E. L., Mischke, R. E., Musser, J. R., Nozar, M., Olchanski, K., Olin, A., Openshaw, R., Porcelli, T. A., Poutissou, J. -M., Poutissou, R., Quraan, M. A., Rodning, N. L., Selivanov, V., Sheffer, G., Shin, B., Stanislaus, T. D. S., Tacik, R., Torokhov, V. D., Tribble, R. E., and Vasiliev, M. A.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, High Energy Physics::Experiment, High Energy Physics - Experiment
Abstract

The quantity P_{mu}^{pi}xi, where xi is one of the muon decay parameters and $P_{\mu}^{\pi}$ is the degree of muon polarization in pion decay, has been measured. The value P_{mu}^{pi}xi = 1.0003 +- 0.0006 stat. +- 0.0038 syst. was obtained. This result agrees with previous measurements but is over a factor of two more precise. It also agrees with the Standard Model prediction for P_{mu}^{pi}xi and thus leads to restrictions on left-right symmetric models., Comment: 11 pages, 7 figures, Phys. Rev. D 74, 072007 (2006) Final version

Published
2006
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24. Measurement of K^+ \to ��^0 ��^+ ����decay using stopped kaons

Author

E470 Collaboration, Shimizu, S., Horie, K., Aliev, M. A., Asano, Y., Baker, T., Depommier, P., Hasinoff, M., Igarashi, Y., Imazato, J., Ivashkin, A. P., Khabibullin, M. M., Khotjantsev, A. N., Kudenko, Y. G., Levchenko, A. S., Lim, G. Y., Macdonald, J. A., Mineev, O. V., Rangacharyulu, C., and Sawada, S.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences
Abstract

The K^+ \to ��^0 ��^+ ����($K_{��3 ��}$) decay has been measured with stopped positive kaons at the KEK 12 GeV proton synchrotron. A $K_{��3 ��}$ sample containing 125 events was obtained. The partial branching ratio $Br(K_{��3 ��}, E_��>30 {\rm MeV}, ��_{��^+ ��}>20^{\circ})$ was found to be $[2.4 \pm 0.5(stat) \pm 0.6(syst)]\times 10^{-5}$, which is in good agreement with theoretical predictions., 12 pages, 3 figures, to be published in Physics Letters B

Published
2005
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25. Ortho-para transition rate in $��$-molecular hydrogen and the proton's induced pseudoscalar coupling $g_p$

Author

Clark, J. H. D., Armstrong, D. S., Gorringe, T. P., Hasinoff, M. D., King, P. M., Stocki, T. J., Tripathi, S., Wright, D. H., and Zolnierczuk, P. A.

Subjects
Nuclear Theory (nucl-th), FOS: Physical sciences, Nuclear Experiment (nucl-ex)
Abstract

We report a measurement of the ortho-para transition rate in the p$��$p molecule. The experiment was conducted at TRIUMF via the measurement of the time dependence of the 5.2 MeV neutrons from muon capture in liquid hydrogen. The measurement yielded an ortho-para rate $��_{op} = (11.1 \pm 1.7 \pm^{0.9}_{0.6}) \times 10^4$ s$^{-1}$ that is substantially larger than the earlier result of Bardin {\it et al.} We discuss the striking implications for the proton's induced pseudoscalar coupling $g_p$., 4 pages, 3 figures, submitted to Phys. Rev. Lett

Published
2005
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26. A new limit of T-violating transverse muon polarization in the $K^{+}\to��^{0}��^{+} ��$ decay

Author

Abe, M., Aliev, M., Anisimovsky, V., Aoki, M., Asano, Y., Baker, T., Blecher, M., Depommier, P., Hasinoff, M., Horie, K., Igarashi, Y., Imazato, J., Ivashkin, A. P., Khabibullin, M. M., Khotjantsev, A. N., Kudenko, Yu. G., Kuno, Y., Lee, K. S., Levchenko, A., Lim, G. Y., Macdonald, J. A., Mineev, O. V., Okorokova, N., Rangacharyulu, C., Shimizu, S., Shin, Y. -H., Shin, Y. -M., Sim, K. S., Yershov, N., and Yokoi, T.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment
Abstract

A search for T-violating transverse muon polarization ($P_T$) in the $K^{+}\to ��^{0}��^{+}��$ decay was performed using kaon decays at rest. A new improved value, $P_T= -0.0017\pm 0.0023 (stat)\pm 0.0011 (syst)$, was obtained giving an upper limit, $| P_T | < 0.0050$. The T-violation parameter was determined to be Im$��= -0.0053 \pm 0.0071(stat)\pm 0.0036(syst)$ giving an upper limit, $|$Im$��, 5 pages, 4 figures

Published
2004
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27. Measurement of $K^+ \to ��^0 ��^0 e^+ ��$ ($K_{e4}^{00}$) decay using stopped positive kaons

Author

Shimizu, S., Horie, K., Aliev, M., Asano, Y., Baker, T., Depommier, P., Hasinoff, M., Igarashi, Y., Imazato, J., Ivashkin, A. P., Khabibullin, M. M., Khotjantsev, A. N., Kudenko, Y. G., Levchenko, A., Lim, G. Y., Macdonald, J. A., Mineev, O. V., Rangacharyulu, C., and Sawada, S.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences
Abstract

The $K^+ \to ��^0 ��^0 e^+ ��$ ($K_{e4}^{00}$) decay has been measured with stopped positive kaons for a data sample of 216 events. A comparison of the observed spectra with a Monte Carlo simulation determined the $K_{e4}^{00}$ form factor. The results are compatible with the $K^+ \to ��^+ ��^- e^+ ��$ data, as estimated from the $��I=1/2$ rule. We also established that the $K_{e4}^{00}$ channel can be used to determine the $��$-$��$ scattering lengths., about 10 pages, 3figures

Published
2004
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28. Test of exotic scalar and tensor interactions in K_e3 decay using stopped positive kaons

Author

Levchenko, As, Khotjantsev, An, Ivashkin, Ap, Abe, M., Aliev, Ma, Anisimovsky, Vv, Aoki, M., Arai, I., Asano, Y., Baker, T., Blecher, M., Depommier, P., Hasinoff, M., Horie, K., Hsuan-Cheng Huang, Igarashi, Y., Ikeda, T., Imazato, J., Khabibullin, Mm, Kudenko, Yg, Kuno, Y., Lee, Ls, Lim, Gy, Macdonald, Ja, Marlow, Dr, Mindas, Cr, Mineev, Ov, Rangacharyulu, C., Shimizu, S., Shin, Ym, Suzuki, A., Watanabe, A., Yershov, Nv, Yokoi, T., and Kek Ps Collaboration, E.

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, High Energy Physics - Experiment (hep-ex), Scalar (mathematics), Zero (complex analysis), FOS: Physical sciences, Tensor, Lambda, Atomic and Molecular Physics, and Optics, High Energy Physics - Experiment, Standard Model
Abstract

The form factors of the decay K+ --> pi0 e+ nu (K_e3) have been determined from the comparison of the experimental and Monte Carlo Dalitz distributions containing about 10^5 K_e3 events. The following values of the parameters were obtained: lambda_+ = 0.0278 +- 0.0017(stat) +- 0.0015(syst), f_S/f_+(0) = 0.0040 +- 0.0160(stat) +- 0.0067(syst) and f_T/f_+(0) = 0.019 +- 0.080(stat) +- 0.038(syst). Both scalar f_S and tensor f_T form factors are consistent with the Standard Model predictions of zero values., 10 pages, 5 figures, contributed to the proceedings of NANP Conference, Dubna, June 19-23, 2001

Published
2001
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29. Search for T-violating transverse muon polarization in K+->pi(0)mu(+)nu decay

Author

Abe, M, Aoki, M, Arai, I, Asano, Y, Baker, T, Blecher, M, Chapman, MD, Depommier, P, Grigorjev, MP, Hasinoff, M, Horie, K, Huang, HC, Igarashi, Y, Ikeda, T, Imazato, J, Ivashkin, AP, Kang, JH, Khabibullin, MM, Khotjantsev, AN, Kudenko, YG, Kuno, Y, Lee, JM, Levchenko, AS, MacDonald, JA, Marlow, DR, Mindas, CR, Mineev, OV, Rangacharyulu, C, Shimizu, HM, Shimizu, S, Shin, YH, Shin, YM, Sim, KS, Suzuki, A, Watanabe, A, and Yokoi, T

Subjects
Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract

An experiment searching for a T-violating transverse muon polarization (Pr) in K+ --> pi (0)mu (+)nu decay is underway at the 12-GeV proton synchrotron at KEK (KEK-PS). This search is sensitive to new mechanisms of T or CP violation beyond the Standard Model. The expected sensitivity from 1996-98 data is presented based on the published result from 1996-97 data and the new result from 1998 data.

Published
2001

30. Test of time reversal invariance in K-mu 3 decay

Author

Kuno, Y, Abe, M, Aoki, M, Arai, I, Asano, Y, Baker, T, Blecher, M, Chapman, MD, Dementyev, DV, Depommier, P, Grigorjev, MP, Gumplinger, P, Hasinoff, M, Henderson, R, Horie, K, Hou, WS, Huang, HC, Igarashi, Y, Ikeda, T, Imazato, J, Ivashkin, AP, Kang, JH, Keil, W, Khabibullin, MM, Khotjantsev, AN, Kudenko, YG, Lee, JM, Lee, KS, Lim, GY, Macdonald, JA, Marlow, DR, Mindas, CR, Mineev, OV, Rangacharyulu, C, Sahu, SK, Sekikawa, S, Shimizu, HM, Shimizu, S, Shin, YH, Shin, YM, Sim, KS, Suzuki, A, Tashiro, T, Watanabe, A, Wright, DH, Yokoi, T, and Collaborat, K-E

Subjects
Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract

An experiment E246 at the 12-GeV proton synchrotron at KEK (KEK-PS), which is searching for the T-violating transverse muon polarization (P-mu(perpendicular to)) in K+ --> pi (0)mu (+)nu decay, is described. The search is sensitive to new mechanisms of T or CP violation beyond the Standard Model. The initial results of P-mu(perpendicular to) = -0.0042+/-0.0049(stat.)+/-0.0009(syst.) and the T-violating parameter Im(xi) = -0.013+/- 0.016(stat.) +/- 0.003(syst.) were determined from the data taken in 1996 and 1997.

Published
2000

31. New result on measurement of T-violating muon polarization in K-mu 3 decay

Author

Abe, M, Aoki, M, Arai, I, Asano, Y, Baker, T, Blecher, M, Chapman, MD, Dementyev, DV, Depommier, P, Grigoriev, MP, Gumplinger, P, Hasinoff, M, Henderson, R, Horie, K, Hou, WS, Huang, HC, Igarashi, Y, Ikeda, T, Imazato, J, Ivashkin, AP, Kang, JH, Keil, W, Khabibullin, MM, Khotyantsev, AN, Kudenko, YG, Kuno, Y, Lee, JM, Lee, KS, Lim, GY, Macdonald, JA, Marlow, DR, Mindas, CR, Mineev, OV, Rangacharyulu, C, Sahu, SK, Sekikawa, S, Shibata, K, Shimizu, HM, Shimizu, S, Shin, YM, Shin, YH, Sim, KS, Suzuki, A, Tashiro, T, Watanabe, A, Wright, D, Yokoi, T, and Collaboration, K-E

Abstract

A measurement of the transverse mu (+) polarization, P-T, in K+ --> pi (0)mu (+)nu decay was performed using stopped kaons. For 1996-1997 data the results are P-T = -0.0042 +/- 0.0049(stat) +/- 0.0009(syst) and Im(xi) = -0.013 +/- 0.016(stat)+/- 0.003(syst), where Im(xi) is T-violating physics parameter.

Published
2000

32. Measurement of the Induced Pseudoscalar Coupling Via Radiative Muon Capture on Hydrogen

Author

Blecher, M., Ahmad, S., Armstrong, D. S., Georges Azuelos, Bertl, Wilhelm H., Chen, C. Q., Depommier, P., Egidy, T., Gorringe, T. P., Gumplinger, P., Hasinoff, M. D., Henderson, R., Jonkmans, G., Larabee, A. J., Macdonald, J. A., Mcdonald, S. C., Poutissou, J. M., Poutissou, R., Robertson, B. C., Sample, D. G., Schott, W., Taylor, G. N., Wright, D. H., and Zhang, N. S.

Subjects
Particle Physics - Experiment
Published
1992
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33. The CAST experiment

Author

Ruz, J., Arik, E., Aune, S., Autiero, D., Barth, K., Belov, A., Beltran, B., Borghi, S., Bourlis, G., Boydag, F.S., Brauninger, H., Carmona, J., Cebrian, S., Cetin, S.A., Collar, J.I., Dafni, T., Davenport, M., Di Lella, L., Dogan, O.B., Eleftheriadis, C., Fanourakis, G., Ferrer Ribas, E., Fischer, H., Franz, J., Galan, J., Geralis, T., Giomataris, I., Gninenko, S., Gomez, H., Hasinoff, M., Heinsius, F.H., Hikmet, I., Gazis, E., Hoffmann, D.H.H., Irastorza, I.G., Jacoby, J., Jakovčić, Krešimir, Kang, D., Konigsmann, K., Kotthaus, R., Krčmar, Milica, Kousouris, K., Kuster, M., Lakić, Biljana, Lasseur, C., Liolios, A., Ljubičić, Ante, Lutz, G., Luzon, G., Miller, D., Morales, A., Morales, J., Niinikoski, T., Nordt, A., Ortiz, A., Papaevangelou, T., Pivovaroff, M., Placci, A., Raitieri, G., Raffelt, G., Riege, H., Rodriguez, A., Savvidis, I., Semertzidis, Y., Serpico, P., Soufli, R., Stewart, L., Tzamarias, K., van Bibber, K., Villar, J., Vogel, J., Walckiers, L., and Zioutas, K.

Subjects
Physics, History, Helioscope, Particle physics, axions, axion-photon coupling, solar axion telescope, Photon, Large Hadron Collider, Computer Science Applications, Education, Massless particle, Solar core, CERN Axion Solar Telescope, Axion, Primakoff effect
Abstract

CAST (CERN Axion Solar Telescope) is a helioscope looking for axions coming from the solar core to the Earth. The experiment, located at CERN, is based on the Primakoff effect and uses a magnetic field of 9 Tesla provided by a decommissioned LHC magnet. CAST is able to follow the Sun during sunrise and sunset and therefore three X-ray detectors are mounted on both ends of the magnet waiting for a photon from axion-to-photon conversion due to the Primakoff effect. During its first phase, which concluded in 2004, CAST has been looking for axions with masses up to 0.02 eV. CAST’ s second phase manages to re-establish the coherence needed to scan for axions with masses up to 1.16 eV by using a buffer gas. This technique enables the experiment to look into the theoretical regions for axions. During the years 2005 and 2006, the use of 4He in CAST has already provided coherence in order to look for axions with masses up to 0.4 eV.

Published
2008
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34. Status of the Solar Axion Search with CAST

Author

Irastorza, I. G., Andriamonje, S., Aune, S., Ferrer Ribas, E., Giomataris, I., Arik, E., Cetin, S., Hikmet, H., Avignone, F., Barth, K., Davenport, M., Di Lella, L., Elias, N., Lasseur, C., Papaevangelou, T., Placci, A., Walckiers, L., Beltran, B., Carmona, J. M., Cebrian, S., Gomez, H., Luzon, G., Morales, J., Rodriguez, A., Ruz, J., Villar, J., Bourlis, G., Leisos, A., Tzamarias, S., Brauninger, H., Collar, J. I., Miller, David Wilkins, Vieira, J. D., Dafni, T., Hoffmann, D. H. H., Kuster, M., Riege, H., Eleftheriadis, C., Liolios, A., Savvidis, I., Fanourakis, G., Geralis, T., Kousouris, K., Fischer, H., Franz, J., Fritz-Herbert Heinsius, Kang, D., Konigsmann, Kay, Schill, C., Vogel, J., Gninenko, S., Goloubev, N., Hasinoff, M. D., Jacoby, J., Jakovcic, K., Krcmar, M., Lakic, B., Kotthaus, R., Lutz, G., Raffelt, G., Pivovaroff, M., Soufli, R., Bibber, K., and Zioutas, K.

35. Radiative muon capture on hydrogen

Author

Wright, D. H., Georges Azuelos, Egidy, T., Henderson, R., Macdonald, J. A., Poutissou, J. M., Poutissou, R., Ahmad, S., Chen, C. Q., Gumplinger, P., Hasinoff, M. D., Larabee, A. J., Sample, D. G., Schott, W., Zhang, N. S., Armstrong, D. S., Blecher, M., Mcdonald, S. C., Taylor, G. N., Depommier, P., Jonkmans, G., Bertl, Wilhelm H., Gorringe, T. P., and Robertson, B. C.

36. CAST status report: A solar axion search using a decommissioned LHC test magnet

Author

Fanourakis, G., Geralis, T., Zachariadou, K., Aalseth, C. E., Avignone, F. T., Creswick, R., Farach, H., Hoffmann, D., Jacoby, J., Mutterer, M., Autiero, D., Barth, K., Delattre, M., Oliveira, R., Di Lella, L., Placci, A., Riege, H., Vullierme, B., Walckiers, L., Zioutas, K., Arik, E., Celebi, G., Cetin, S., Erduran, N., Mailov, A., Girard, T. A., Valko, P., Fiorini, C., Longoni, A., Sampietro, M., Gninenko, S. N., Golubev, N. A., Kovzelev, A. V., Matveev, V. A., Lutz, G., Brauninger, H., Raffelt, G. G., Delbart, A., Giomataris, I., Papadopoulos, I., Collar, J. I., Bowyer, S. M., Brodzinski, R. L., Knopf, M. A., Miley, H. S., Pitts, W. K., Thomas Girard, Thompson, R. C., Wilcox, W., Nussinov, S., Liolios, A., Nikas, D., Nikolaidis, A., Polymeris, G., Savvidis, I., Hasinoff, M., Jakovcic, K., Krcmar, M., Krecak, Z., Lakic, B., Ljubicic, A., Stipcevic, M., Carmona, J. M., Cebrian, S., Garcia, E., Irastorza, I. G., Luzon, G., Morales, A., Morales, J., Ortiz, A., Puimedon, J., Sarsa, M., Scopel, S., and Villar, J. A.

Subjects
Detectors and Experimental Techniques

37. Search for solar axions with the CAST-experiment

Author

Vogel, J., Arik, E., Aune, S., Autiero, D., Barth, K., Belov, A., Beltran, B., Borghi, S., Bourlis, G., Boydag, F. S., Brauninger, H., Carmona, J., Cebriin, S., Cetin, S. A., Collar, J. I., Dafni, T., Davenport, M., Di Lella, L., Dopan, O. B., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Fischer, H., Franz, J., Galdn, J., Geralis, T., Giomataris, I., Gninenko, S., Gbmez, H., Hasinoff, M., H Heinsius, F., Hikmet, I., Hoffmann, D. H. H., Irastorza, I. G., Jacoby, J., Jakovcic, K., Kang, D., Konigsmann, K., Kotthaus, R., Krcmar, M., Kousouris, K., Kuster, M., Lakic, B., Lasseur, C., Liolios, A., Ljubicic, A., Lutz, G., Luzbn, G., Miller, D., Morales, A., Morales, J., Niinikoski, T., Nordt, A., Ortiz, A., Papaevangelou, T., Michael Pivovaroff, Placci, A., Raffelt, G., Riege, H., Rodriguez, A., Ruz, J., Savvidis, I., Semertzidis, Y., Serpico, P., Soufli, R., Stewart, L., Tzamarias, S., Bibber, K., Villar, J., Walckiers, L., and Zioutas, K.

38. A kinematically complete measurement of Κ+ → π+π0π0 decays

Author

Shin, Y. -H, Abe, M., Aoki, M., Arai, I., Asano, Y., Baker, T., Blecher, M., Chapman, M. D., Dementyev, D., Depommier, P., Grigorjev, M., Gumplinger, P., Hasinoff, M., Henderson, R., Horie, K., Hou, W. S., Huang, H. C., Igarashi, Y., Ikeda, T., Ivashkin, A., Imazato, J., Lee, J. -M, Lee, K. S., Lim, G. Y., Kang, J. H., Keil, W., Marat Khabibullin, Khotjantsev, A., Kudenko, Y., Kuno, Y., Macdonald, J. A., Mindas, C. R., Mineev, O., Rangacharyulu, C., Sahu, S. K., Sekikawa, S., Shimizu, H. M., Shimizu, S., Shibata, K., Shin, Y. M., Sim, K. S., Suzuki, A., Tashiro, T., Watanabe, A., Wright, D., and Yokoi, T.

39. Search for solar axions: CAST

Author

Lakić, B., Andriamonje, S., Arsov, V., 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, M., Kousouris, K., Kuster, M., Lasseur, C., Anastasios Liolios, Ljubičić, A., 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.

40. CAST: A Search for solar axions at CERN

Author

Collar, J. I., Andriamonje, S., Arik, E., Autiero, D., Avignone, F., Barth, K., Bingol, E., Brauninger, H., Brodzinski, R., Carmona, J., Chesi, E., Cebrian, S., Cetin, S., Cipolla, G., Creswick, R., Dafni, T., Davenport, M., Oliveira, R., Dedoussis, S., Di Lella, L., Eleftheriadis, C., Fanourakis, G., Farach, H., Ferrer, E., Fischer, H., Formenti, F., Geralis, T., Giomataris, I., Gninenko, S., Goloubev, N., Hartmann, R., Hasinoff, M., Hoffmann, D., Irastorza, I. G., Jacoby, J., Kang, D., Konigsmann, Kay, Kotthaus, R., Krcmar, M., Kuster, M., Lakic, B., Liolios, A., Ljubicic, A., Lutz, G., Luzon, G., Miley, H., Morales, A., Morales, J., Mutterer, M., Nicolaidis, A., Ortiz, A., Papaevangelou, T., Placci, A., Raffelt, G., Riege, H., Sarsa, M., Savvidis, I., Schopper, R., Semertzidis, Y. K., Spano, C., Stipcevic, M., Vasileiou, V., Villar, J., Vullierme, B., Walckiers, L., Zachariadou, K., and Zioutas, K.

Subjects
Physics::Instrumentation and Detectors, Particle Physics - Experiment
Abstract

The new axion helioscope at CERN started acquiring data during September of 2002: CAST (Cern Axion Solar Telescope) employs a decommissioned LHC dipole magnet to convert putative solar axions or axion-like particles into detectable photons. The unprecedented dipole magnet intensity and length (9.5 T, 10 m) results in a projected sensitivity that surpasses astrophysical constraints on these particles for the first time, increasing the chance of discovery. The use of X-ray focusing optics and state-of-the-art detector technology has led to an extremely low background for an experiment above ground. A brief status report is given, with emphasis on the tracking and control system and possible future extensions. The new axion helioscope at CERN started acquiring data during September of 2002: CAST (Cern Axion Solar Telescope) employs a decommissioned LHC dipole magnet to convert putative solar axions or axion-like particles into detectable photons. The unprecedented dipole magnet intensity and length (9.5 T, 10 m) results in a projected sensitivity that surpasses astrophysical constraints on these particles for the first time, increasing the chance of discovery. The use of X-ray focusing optics and state-of-the-art detector technology has led to an extremely low background for an experiment above ground. A brief status report is given, with emphasis on the tracking and control system and possible future extensions.

41. The Search for solar axions in the CAST experiment

Author

Kang, D., Andriamonje, S., Arsov, V., Aune, S., Autiero, D., Avignone, F. T., 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., Hasinoff, M. D., Heinsius, F. H., Hoffmann, D. H. H., Irastorza, I. G., Jacoby, J., Konigsmann, K., Kotthaus, R., Krcmar, M., Kousouris, K., Kuster, M., Lakic, B., Lasseur, C., Liolios, A., Ljubicic, A., Lutz, G., Luzon, G., Miller, D. W., Morales, A., Morales, J., Mutterer, M., Nikolaidis, A., Ortiz, A., Papaevangelou, T., Placci, A., Raffelt, G., jaime ruz, Riege, H., Sarsa, M. L., Savvidis, I., Serpico, P., Semertzidis, Y., Stewart, L., Vieira, J. D., Villar, J., Vogel, J., Walckiers, L., Zachariadou, K., and Zioutas, K.

Subjects
Physics::Instrumentation and Detectors, Particle Physics - Experiment
Abstract

The CAST (CERN Axion Solar Telescope) experiment at CERN searches for solar axions with energies in the keV range. It is possible that axions are produced in the core of the sun by the interaction of thermal photons with virtual photons of strong electromagnetic fields. In this experiment, the solar axions can be reconverted to photons in the transversal field of a 9 Tesla superconducting magnet. At both ends of the 10m-long dipole magnet three different X-ray detectors were installed, which are sensitive in the interesting photon energy range. Preliminary results from the analysis of the 2004 data are presented: g$_{a\gamma}

42. Measurement of Gamma(K-mu 3)/Gamma(K-e3) ratio using stopped positive kaons

Author

Horie, K., Shimizu, S., Abe, M., Aoki, M., Arai, I., Asano, Y., Baker, T., Blechner, M., Chapman, Md, Depommier, P., Hasinoff, M., Hsuan-Cheng Huang, Igarashi, Y., Ikeda, T., Imazato, J., Ivashkin, Ap, Khabibullin, Mm, Khotjantsev, An, Kudenko, Yg, Kuno, Y., Lee, Jm, Lee, Ks, Levchenko, As, Lim, Gy, Macdonald, Ja, Mindas, Cr, Mineev, Ov, Shin, Yh, Shin, Ym, Suzuki, A., Watanabe, A., Yokoi, T., and Kek-E, Collaborat

43. Search for solar axions: the CAST experiment at CERN

Author

Beltran, B., Andrjamonje, S., Arsov, V., Aune, S., Autiero, D., Avignone, F., Barth, K., Belov, A., Brauninger, H., Carmona, J. M., Cebrian, S., Chesi, E., Collar, J. I., Creswick, R., Dafni, T., Davenport, M., Lella, L. D. I., 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., Konigsmann, K., Kotthaus, R., Krcmar, M., Kousouris, K., Kuster, M., Lakic, B., Lasseur, C., Liolios, A., Ljubicic, A., Lutz, G., Luzon, G., Miller, D. W., Morales, A., Morales, J., Mutterer, M., Nikolaidis, A., Ortiz, A., Papaevangelou, T., Placci, A., Raffelt, G., jaime ruz, Riege, H., Sarsa, M. L., Savvidis, I., Serber, W., Serpico, P., Semertzidis, Y., Stewart, L., Vieira, J. D., Villar, J., Walckiers, L., Zachariadou, K., and Zioutas, K.

44. Search for solar axions with the CAST experiment

Author

Lakic, B., Arik, E., Aune, S., Autiero, D., Barth, K., Belov, A., Beltrán, B., Borghi, S., Bourlis, G., Boydag, F. S., Bräuninger, H., Carmona, J. M., Cebrián, S., Cetin, S. A., Collar, J. I., Dafni, T., Davenport, M., Di Lella, L., Dogan, O. B., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Fischer, H., Friedrich, P., Franz, J., Galán, J., Geralis, T., Giomataris, I., Gninenko, S., Gómez, H., Hartmann, R., Hasinoff, M., Heinsius, F. H., Hikmet, I., Hoffmann, D. H. H., Irastorza, I. G., Jacoby, J., Jakovcic, K., Kang, D., Königsmann, K., Kotthaus, R., Krcmar, M., Kousouris, K., Kuster, M., Lasseur, C., Anastasios Liolios, Ljubicic, A., Lutz, G., Luzón, G., Miller, D., Morales, J., Niinikoski, T., Nordt, A., Ortiz, A., Papaevangelou, T., Pivovaroff, M. J., Placci, A., Raffelt, G., Riege, H., Rodríguez, A., Ruz, J., Savvidis, I., Semertzidis, Y., Serpico, P., Soufli, R., Stewart, L., Bibber, K., Villar, J., Vogel, J., Walckiers, L., and Zioutas, K.

Subjects
axions, axion-photon coupling, dark matter
Abstract

The CERN Axion Solar Telescope (CAST) is searching for axions produced by the Primakoff process in the solar core. CAST is using a dipole magnet where axions could be converted back into X-rays. Phase I data analysis resulted in the most restrictive experimental limit on the axionphoton coupling constant for ma .0.02 eV. In CAST Phase II, the sensitivity is extended to higher axion masses. Results of the analysis of 2005 and 2006 data, covering the range ma .0.4 eV, will be presented. Currently CAST is searching for axions with masses up to 1.2 eV.

45. New solar axion search using the CERN Axion Solar Telescope with He-4 filling

Author

Arik, M., Aune, S., Barth, K., Belov, A., Braeuninger, 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., Galan, J., Garcia, J. A., Gardikiotis, A., Garza, J. G., Gazis, E. N., Geralis, T., Georgiopoulou, E., Giomataris, I., Gninenko, S., Marzoa, M. Gomez, 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., Luzon, G., Neff, S., Niinikoski, T., Nordt, A., Ortega, I., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Rodriguez, A., Rosu, M., Ruz, J., Savvidis, I., Shilon, I., Solanki, S. K., Stewart, L., Tomas, A., Vafeiadis, T., Villar, J., Vogel, J. K., Yildiz, S. C., Zioutas, K., and CAST Collaboration

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.

47. Search for Solar Axions by the CERN Axion Solar Telescope with He-3 Buffer Gas: Closing the Hot Dark Matter Gap

Author

Arik, M., Aune, S., Barth, K., Belov, A., Borghi, S., Braeuninger, 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., Galan, J., Garcia, J. A., Gardikiotis, A., Garza, J. G., Gazis, E. N., Geralis, T., Georgiopoulou, E., Giomataris, I., Gninenko, S., Gomez, H., Marzoa, M. Gomez, Gruber, E., Guthoerl, 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., Koenigsmann, K., Kotthaus, R., Krcmar, M., Kuster, M., Lakic, B., Lang, P. M., Laurent, J. M., Liolios, A., Ljubicic, A., Luzon, G., Neff, S., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Riege, H., Rodriguez, A., Rosu, M., Ruz, J., Savvidis, I., Shilon, I., Silva, P. S., Solanki, S. K., Stewart, L., Tomas, A., Tsagri, M., Van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J. K., and CAST Collaboration

Subjects
Physics::Instrumentation and Detectors, Astrophysics::Earth and Planetary Astrophysics
Abstract

The CERN Axion Solar Telescope has finished its search for solar axions with He-3 buffer gas, covering the search range 0.64 eV less than or similar to ma less than or similar to 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 g(a gamma) less than or similar to 3.3 x 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 g(a gamma), for example by the currently discussed next generation helioscope International AXion Observatory.

48. Solar axion search with the CAST experiment

Author

Borghi, S., Arik, E., Aune, S., Autiero, D., Barth, K., Belov, A., Beltrán, B., Bourlis, G., Boydag, F. S., Bräuninger, H., Cantatore, G., Carmona, J. M., Cebrián, S., Cetin, S. A., Collar, J. I., Dafni, T., Davenport, M., Di Lella, L., Dogan, O. B., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Fischer, H., Franz, J., Galán, J., Gazis, E., Geralis, T., Giomataris, I., Gninenko, S., Gómez, H., Hasinoff, M., Heinsius, F. H., Hikmet, I., Hoffmann, D. H. H., Irastorza, I. G., Jacoby, J., Jakovčić, K., Kang, D., Karageorgopoulou, T., Karuza, M., Königsmann, K., Kotthaus, R., Krčmar, M., Kousouris, K., Kuster, M., Lakić, B., Lasseur, C., Liolios, A., Ljubičić, A., Lozza, V., Lutz, G., Luzón, G., Miller, D., Morales, A., Morales, J., Niinikoski, T., Nordt, A., Ortiz, A., Papaevangelou, T., Michael Pivovaroff, Placci, A., Raiteri, G., Raffelt, G., Riege, H., Rodríguez, A., Ruz, J., Savvidis, I., Semertzidis, Y., Serpico, P., Solanki, S. K., Soufli, R., Stewart, L., Tsagri, M., Bibber, K., Villar, J., Vogel, J., Walckiers, L., and Zioutas, K.

Subjects
High Energy Physics::Theory, Astrophysics and Astronomy, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology
Abstract

The CAST (CERN Axion Solar Telescope) experiment is searching for solar axions by their conversion into photons inside the magnet pipe of a LHC prototype dipole. In the phase II, CAST is operating with a buffer gas inside the magnet bore apertures in order to extent the sensitivity of the experiment to larger axion masses. Preliminary results from the analysis of this second phase with He inside the magnet pipes excludes axions down to $g_{aγ}$ < 2.2 · $10^{−10}GeV^{−1}$ at 95% C.L. for 0.02 eV < $m_{\alpha}$ < 0.39 eV. The data analysis has resulted in the most restrictive experimental limit on the coupling constant of axions to photons and for the first time experimental result has entered the theory motivated axion parameter space. At the beginning of 2008, data started to be taken with He in the magnet pipes in order to extend the sensitivity to axion masses up to 1.2 eV.

49. Radiative muon capture on hydrogen and the induced pseudoscalar coupling

Author

Hasinoff, M. D., Armstrong, D. S., Georges Azuelos, Bertl, Wilhelm H., Blecher, M., Chen, C. Q., Depommier, P., Doyle, B., Egidy, T., Gorringe, T. P., Gumplinger, P., Henderson, R., Jonkmans, G., Larabee, A. J., Macdonald, J. A., Mcdonald, S. C., Munro, M., Poutissou, J. M., Poutissou, R., Robertson, B. C., Sample, D. G., Schott, W., Taylor, G. N., and Wright, D. H.

50. Blind analysis results of the TWIST experiment

Author

Hillairet, A., Bayes, R., Davydov, Yu I., Faszer, W., Fujiwara, M. C., Grossheim, A., Gill, D. R., Gumplinger, P., Henderson, R. S., Hu, J., Marshall, G. M., Mischke, R. E., Olchanski, K., Arthur Olin, Openshaw, R., Poutissou, J. -M, Poutissou, R., Sheffer, G., Shin, B., Gaponenko, A., Macdonald, R. P., Bueno, J. F., Hasinoff, M. D., Depommier, P., Mathie, E. W., Tacik, R., Selivanov, V., Gagliardi, C. A., Tribble, R. E., Koetke, D. D., and Stanislaus, T. D. S.

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