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50 GeV $π^-$ in, nothing out: a sensitive probe of invisible $η$ and $η'$ decays with NA64h

Fuente: arXiv

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Detalles Bibliográficos
Autores principales:	Andreev, Yu. M., Antonov, A., Torres, M. A. Ayala, Banerjee, D., Oberhauser, B. Banto, Bernhard, J., Bisio, P., Celentano, A., Charitonidis, N., Cooke, D., Crivelli, P., Depero, E., Dermenev, A. V., Donskov, S. V., Dusaev, R. R., Enik, T., Frolov, V. N., Gertsenberger, S. V., Girod, S., Gninenko, S. N., Hosgen, M., Kachanov, V. A., Kambar, Y., Karneyeu, A. E., Kekelidze, G. D., Ketzer, B., Kirpichnikov, D. V., Kolosov, V. N., Kramarenko, V. A., Kravchuk, L. V., Krasnikov, N. V., Kuleshov, S. V., Lyubovitskij, V. E., Marini, A., Marsicano, L., Matveev, V. A., Fredes, R. Mena, Yanssen, R. G. Mena, Bueno, L. Molina, Mongillo, M., Peshekhonov, D. V., Polyakov, V. A., Radics, B., Salamatin, K. M., Samoylenko, V. D., Sieber, H., Shchukin, D. A., Soto, O., Tikhomirov, V. O., Tlisova, I. V., Toropin, A. N., Tuzi, M., Volkov, P. V., Volkov, V. Yu., Voronchikhin, I. V., Zamora-Saa, J., Zhevlakov, A. S.
Formato:	Preprint
Publicado:	2024
Materias:	High Energy Physics - Experiment High Energy Physics - Phenomenology
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

_version_	1866909215982878720
author	Andreev, Yu. M. Antonov, A. Torres, M. A. Ayala Banerjee, D. Oberhauser, B. Banto Bernhard, J. Bisio, P. Celentano, A. Charitonidis, N. Cooke, D. Crivelli, P. Depero, E. Dermenev, A. V. Donskov, S. V. Dusaev, R. R. Enik, T. Frolov, V. N. Gertsenberger, S. V. Girod, S. Gninenko, S. N. Hosgen, M. Kachanov, V. A. Kambar, Y. Karneyeu, A. E. Kekelidze, G. D. Ketzer, B. Kirpichnikov, D. V. Kolosov, V. N. Kramarenko, V. A. Kravchuk, L. V. Krasnikov, N. V. Kuleshov, S. V. Lyubovitskij, V. E. Marini, A. Marsicano, L. Matveev, V. A. Fredes, R. Mena Yanssen, R. G. Mena Bueno, L. Molina Mongillo, M. Peshekhonov, D. V. Polyakov, V. A. Radics, B. Salamatin, K. M. Samoylenko, V. D. Sieber, H. Shchukin, D. A. Soto, O. Tikhomirov, V. O. Tlisova, I. V. Toropin, A. N. Tuzi, M. Volkov, P. V. Volkov, V. Yu. Voronchikhin, I. V. Zamora-Saa, J. Zhevlakov, A. S.
author_facet	Andreev, Yu. M. Antonov, A. Torres, M. A. Ayala Banerjee, D. Oberhauser, B. Banto Bernhard, J. Bisio, P. Celentano, A. Charitonidis, N. Cooke, D. Crivelli, P. Depero, E. Dermenev, A. V. Donskov, S. V. Dusaev, R. R. Enik, T. Frolov, V. N. Gertsenberger, S. V. Girod, S. Gninenko, S. N. Hosgen, M. Kachanov, V. A. Kambar, Y. Karneyeu, A. E. Kekelidze, G. D. Ketzer, B. Kirpichnikov, D. V. Kolosov, V. N. Kramarenko, V. A. Kravchuk, L. V. Krasnikov, N. V. Kuleshov, S. V. Lyubovitskij, V. E. Marini, A. Marsicano, L. Matveev, V. A. Fredes, R. Mena Yanssen, R. G. Mena Bueno, L. Molina Mongillo, M. Peshekhonov, D. V. Polyakov, V. A. Radics, B. Salamatin, K. M. Samoylenko, V. D. Sieber, H. Shchukin, D. A. Soto, O. Tikhomirov, V. O. Tlisova, I. V. Toropin, A. N. Tuzi, M. Volkov, P. V. Volkov, V. Yu. Voronchikhin, I. V. Zamora-Saa, J. Zhevlakov, A. S.
contents	We present the first results from a proof-of-concept search for dark sectors via invisible decays of pseudoscalar $η$ and $η'$ mesons in the NA64h experiment at the CERN SPS. Our novel technique uses the charge-exchange reaction of 50 GeV $π^-$ on nuclei of an active target as the source of neutral mesons. The $η, η' \to invisible$ events would exhibit themselves via a striking signature - the complete disappearance of the incoming beam energy in the detector. No evidence for such events has been found with $2.9\times10^{9}$ pions on target accumulated during one day of data taking. This allows us to set a stringent limit on the branching ratio ${\rm Br}(η' \to invisible) < 2.1 \times 10^{-4}$ improving the current bound by a factor of $\simeq3$. We also set a limit on ${\rm Br}(η\to invisible) < 1.1 \times 10^{-4}$ comparable with the existing one. These results demonstrate the great potential of our approach and provide clear guidance on how to enhance and extend the sensitivity for dark sector physics from future searches for invisible neutral meson decays.
format	Preprint
id	arxiv_https___arxiv_org_abs_2406_01990
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	50 GeV $π^-$ in, nothing out: a sensitive probe of invisible $η$ and $η'$ decays with NA64h Andreev, Yu. M. Antonov, A. Torres, M. A. Ayala Banerjee, D. Oberhauser, B. Banto Bernhard, J. Bisio, P. Celentano, A. Charitonidis, N. Cooke, D. Crivelli, P. Depero, E. Dermenev, A. V. Donskov, S. V. Dusaev, R. R. Enik, T. Frolov, V. N. Gertsenberger, S. V. Girod, S. Gninenko, S. N. Hosgen, M. Kachanov, V. A. Kambar, Y. Karneyeu, A. E. Kekelidze, G. D. Ketzer, B. Kirpichnikov, D. V. Kolosov, V. N. Kramarenko, V. A. Kravchuk, L. V. Krasnikov, N. V. Kuleshov, S. V. Lyubovitskij, V. E. Marini, A. Marsicano, L. Matveev, V. A. Fredes, R. Mena Yanssen, R. G. Mena Bueno, L. Molina Mongillo, M. Peshekhonov, D. V. Polyakov, V. A. Radics, B. Salamatin, K. M. Samoylenko, V. D. Sieber, H. Shchukin, D. A. Soto, O. Tikhomirov, V. O. Tlisova, I. V. Toropin, A. N. Tuzi, M. Volkov, P. V. Volkov, V. Yu. Voronchikhin, I. V. Zamora-Saa, J. Zhevlakov, A. S. High Energy Physics - Experiment High Energy Physics - Phenomenology We present the first results from a proof-of-concept search for dark sectors via invisible decays of pseudoscalar $η$ and $η'$ mesons in the NA64h experiment at the CERN SPS. Our novel technique uses the charge-exchange reaction of 50 GeV $π^-$ on nuclei of an active target as the source of neutral mesons. The $η, η' \to invisible$ events would exhibit themselves via a striking signature - the complete disappearance of the incoming beam energy in the detector. No evidence for such events has been found with $2.9\times10^{9}$ pions on target accumulated during one day of data taking. This allows us to set a stringent limit on the branching ratio ${\rm Br}(η' \to invisible) < 2.1 \times 10^{-4}$ improving the current bound by a factor of $\simeq3$. We also set a limit on ${\rm Br}(η\to invisible) < 1.1 \times 10^{-4}$ comparable with the existing one. These results demonstrate the great potential of our approach and provide clear guidance on how to enhance and extend the sensitivity for dark sector physics from future searches for invisible neutral meson decays.
title	50 GeV $π^-$ in, nothing out: a sensitive probe of invisible $η$ and $η'$ decays with NA64h
topic	High Energy Physics - Experiment High Energy Physics - Phenomenology
url	https://arxiv.org/abs/2406.01990