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Your search keyword '"Dierigl, M."' showing total 11 results
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11 results on '"Dierigl, M."'

1. Axion cosmology, lattice QCD and the dilute instanton gas

Author

Borsanyi, S., Dierigl, M., Fodor, Z., Katz, S. D., Mages, S. W., Nogradi, D., Redondo, J., Ringwald, A., and Szabo, K. K.

Subjects
High Energy Physics - Lattice, High Energy Physics - Phenomenology
Abstract

Axions are one of the most attractive dark matter candidates. The evolution of their number density in the early universe can be determined by calculating the topological susceptibility $\chi(T)$ of QCD as a function of the temperature. Lattice QCD provides an ab initio technique to carry out such a calculation. A full result needs two ingredients: physical quark masses and a controlled continuum extrapolation from non-vanishing to zero lattice spacings. We determine $\chi(T)$ in the quenched framework (infinitely large quark masses) and extrapolate its values to the continuum limit. The results are compared with the prediction of the dilute instanton gas approximation (DIGA). A nice agreement is found for the temperature dependence, whereas the overall normalization of the DIGA result still differs from the non-perturbative continuum extrapolated lattice results by a factor of order ten. We discuss the consequences of our findings for the prediction of the amount of axion dark matter., Comment: 9 pages, 7 figures

Published
2015
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2. Particle identification using clustering algorithms

Author

Wirth, R., Fiori, E., Löher, B., Savran, D., Silva, J., Pol, H. Álvarez, Gil, D. Cortina, Pietras, B., Bloch, T., Kröll, T., Nácher, E., Perea, Á., Tengblad, O., Bendel, M., Dierigl, M., Gernhäuser, R., Bleis, T. Le, and Winkel, M.

Subjects
Physics - Instrumentation and Detectors
Abstract

A method that uses fuzzy clustering algorithms to achieve particle identification based on pulse shape analysis is presented. The fuzzy c-means clustering algorithm is used to compute mean (principal) pulse shapes induced by different particle species in an automatic and unsupervised fashion from a mixed set of data. A discrimination amplitude is proposed using these principal pulse shapes to identify the originating particle species of a detector pulse. Since this method does not make any assumptions about the specific features of the pulse shapes, it is very generic and suitable for multiple types of detectors. The method is applied to discriminate between photon- and proton-induced signals in CsI(Tl) scintillator detectors and the results are compared to the well-known integration method., Comment: 7 pages, 7 figures

Published
2013
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3. CALIFA, a Dedicated Calorimeter for the R3B/FAIR

Author

Cortina-Gil, D., Alvarez-Pol, H., Aumann, T., Avdeichikov, V., Bendel, M., Benlliure, J., Bertini, D., Bezbakh, A., Bloch, T., Böhmer, M., Borge, M.J.G., Briz, J.A., Cabanelas, P., Casarejos, E., Carmona Gallardo, M., Cederkäll, J., Chulkov, L., Dierigl, M., Di Julio, D., Durán, I., Fiori, E., Fomichev, A., Galaviz, D., Gascón, M., Gernhäuser, R., Gerl, J., Golubev, P., Golovkov, M., González, D., Gorshkov, A., Heinz, A., Heil, M., Henning, W., Ickert, G., Ignatov, A., Jakobsson, B., Johansson, H.T., Kröll, Th., Krücken, R., Krupko, S., Kurz, N., Le Bleis, T., Löher, B., Nacher, E., Nilsson, T., Parrilla, C., Perea, A., Pietralla, N., Pietras, B., Reifarth, R., Sanchez del Rio, J., Savran, D., Sidorchuk, S., Simon, H., Schnorrenberger, L., Tengblad, O., Teubig, P., Thies, R., Vilán, J.A., von Schmid, M., Winkel, M., Winkler, S., Wamers, F., and Yañez, P.

Published
2014
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6. The CALIFA endcap

Author

Cortina, D., Alvarez-Pol, H., Borge, M. J. G., Briz, J., Cabanelas, P., Casarejos, E., Carmona Gallardo, M., Cederkäll, J., Chulkov, Leonid, Dierigl, M., Di Julio, D., Fernandez Martinez, G., Aumann, T., Fiori, E., Fomichev, A., Galaviz, D., Gernhäuser, R., Gerl, J., Golubev, P., Gonzalez, D., Gorshkov, A., Hartig, A., Heinz, A., Avdeichikov, V., Heil, M., Heiss, B., Ignatov, A., Jakobsson, B., Johansson, H. T., Klenze, P., Köeper, D., Kröll, T., Krücken, R., Krupko, S., Bendel, M., Kurz, F., Le Bleis, T., Löher, B., Nacher, E., Nilsson, T., Perea, A., Pfeffer, C., Pietras, B., Reifarth, R., Remmels, P., Benlliure, J., Rhee, H. B., Sanchez del Rio, J., Savran, D., Scheit, H., Sidorchuk, S., Simon, H., Tengblad, O., Teubig, P., Thies, R., Vilan, J. A., Bertini, D., von Schmid, M., Winkel, M., Winkler, S., Wamers, F., Yanez, P., Bezbakh, A., Bloch, T., and Böhmer, M.

Subjects
Physics
Abstract

GSI Scientific Report 2014 - GSI Report 2015-1

Published
2015
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7. Progress report of the CALIFA/$R^3B$ calorimeter

Author

Cortina-Gil, D., Alvarez-Pol, H., Borge, M. J. G., Briz, J. A., Cabanelas, P., Casarejos, E., Carmona Gallardo, M., Cederkäll, J., Chulkov, L., Dierigl, M., Di Julio, D., Duran, I., Aumann, T., Fiori, E., Fomichev, A., Galaviz, D., Gascon, M., Gernhäuser, R., Gerl, J., Golubev, P., Golovkov, M., Gonzalez, D., Gorshkov, A., Avdeichikov, V., Heinz, A., Heil, M., Heiss, B., Henning, W., Ickert, G., Ignatov, A., Jakobsson, B., Johansson, H. T., Kmiecik, M., Kröll, T., Bendel, M., Krücken, R., Krupko, S., Kurz, F., Le Bleis, T., Löher, B., Maj, A., Nacher, E., Nilsson, T., Perea, A., Pfeffer, C., Benlliure, J., Pietralla, N., Pietras, B., Reifarth, R., Sanchez del Rio, J., Savran, D., Sidorchuk, S., Simon, H., Schnorrenberger, L., Tengblad, O., Teubig, P., Bertini, D., Thies, R., Vilan, J. A., von Schmid, M., Winkel, M., Winkler, S., Wamers, F., Yanez, P., Zieblinski, M., Bezbakh, A., Bloch, T., and Böhmer, M.

Subjects
Physics
Abstract

GSI Scientific Report 2013 - GSI Report 2014-1

Published
2014
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8. Status of the CALIFA/R$^{3}$B calorimeter

Author

Cortina-Gil, D., Alvarez-Pol, H., Borge, M. J. G., Briz, J. A., Cabanelas, P., Casarejos, E., Carmona Gallardo, M., Cederkäll, J., Chulkov, L., Dierigl, M., Di Julio, D., Duran, I., Aumann, T., Fiori, E., Fomichev, A., Galaviz, D., Gascon, M., Gernhäuser, R., Gerl, J., Golubev, P., Golovkov, M., Gonzalez, D., Gorshkov, A., Avdeichikov, V., Heinz, A., Heil, M., Henning, W., Ickert, G., Ignatov, A., Jakobsson, B., Johansson, H. T., Kröll, T., Krücken, R., Krupko, S., Bendel, M., Kurz, F., Le Bleis, T., Löher, B., Montes, N., Nacher, E., Nilsson, T., Parrilla, C., Perea, A., Pietralla, N., Pietras, B., Benlliure, J., Reifarth, R., Sanchez del Rio, J., Savran, D., Sidorchuk, S., Simon, H., Schnorrenberger, L., Tengblad, O., Teubig, P., Thies, R., Vilan, J. A., Bertini, D., von Schmid, M., Winkel, M., Winkler, S., Wamers, F., Yanez, P., Bezbakh, A., Bloch, T., and Böhmer, M.

Published
2013

9. Particle identification using clustering algorithms

Author

Wirth, R., primary, Fiori, E., additional, Löher, B., additional, Savran, D., additional, Silva, J., additional, Álvarez Pol, H., additional, Cortina Gil, D., additional, Pietras, B., additional, Bloch, T., additional, Kröll, T., additional, Nácher, E., additional, Perea, Á., additional, Tengblad, O., additional, Bendel, M., additional, Dierigl, M., additional, Gernhäuser, R., additional, Le Bleis, T., additional, and Winkel, M., additional

Published
2013
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10. String Universality and Non-Simply-Connected Gauge Groups in 8D.

Author

Cvetič M, Dierigl M, Lin L, and Zhang HY

Abstract

We present a consistency condition for 8D N=1 supergravity theories with nontrivial global structure G/Z for the non-Abelian gauge group, based on an anomaly involving the Z 1-form center symmetry. The interplay with other swampland criteria identifies the majority of 8D theories with gauge group G/Z, which have no string theory realization, as inconsistent quantum theories when coupled to gravity. While this condition is equivalent to geometric properties of elliptic K3 surfaces in F-theory compactifications, it constrains the unexplored landscape of gauge groups in other 8D string models.

Published
2020
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11. de Sitter Vacua from an Anomalous Gauge Symmetry.

Author

Buchmuller W, Dierigl M, Ruehle F, and Schweizer J

Abstract

We find a new class of metastable de Sitter solutions in compactifications of six-dimensional supergravity motivated by type IIB or heterotic string vacua. Two Fayet-Iliopoulos terms of a local U(1) symmetry are generated by magnetic flux and by the Green-Schwarz term canceling the gauge anomalies, respectively. The interplay between the induced D term, the moduli dependence of the effective gauge coupling, and a nonperturbative superpotential stabilizes the moduli and determines the size of the extra dimensions.

Published
2016
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