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

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

by Gertsenberger, S V , Salamatin, K M , Kravchuk, L V , Sieber, H , Cooke, D , Girod, S , Antonov, A , Mena Yanssen, R G , Kolosov, V N , V Yu Volkov , Tlisova, I V , Voronchikhin, I V , Zamora-Saa, J , Lyubovitskij, V E , Soto, O , Volkov, P V , Karneyeu, A E , Dermenev, A V , Ketzer, B , Toropin, A N , Charitonidis, N , Frolov, V N , Peshekhonov, D V , L Molina Bueno , Bisio, P , Ayala Torres, M A , Zhevlakov, A S , Kambar, Y , Polyakov, V A , Radics, B , Banerjee, D , Shchukin, D A , Depero, E , Matveev, V A , Crivelli, P , Tuzi, M , Kirpichnikov, D V , Mongillo, M , R Mena Fredes , Donskov, S V , Gninenko, S N , Kuleshov, S V , Kachanov, V A , Kramarenko, V A , Bernhard, J , Celentano, A , Andreev, Yu M , Samoylenko, V D , Hosgen, M , Tikhomirov, V O , Oberhauser, B Banto , Dusaev, R R , Enik, T , Kekelidze, G D , Marsicano, L , Krasnikov, N V , Marini, A

in Charge exchange / Mesons / Particle decay / Pions / Synchrotrons

2024

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

in Charge exchange / Mesons / Particle decay / Pions / Synchrotrons

2024

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

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

in Charge exchange / Mesons / Particle decay / Pions / Synchrotrons

2024

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

Paper

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

Gertsenberger, S V,

Salamatin, K M,

Kravchuk, L V,

Sieber, H,

Cooke, D,

Girod, S,

Antonov, A,

Mena Yanssen, R G,

Kolosov, V N,

V Yu Volkov,

Tlisova, I V,

Voronchikhin, I V,

Zamora-Saa, J,

Lyubovitskij, V E,

Soto, O,

Volkov, P V,

Karneyeu, A E,

Dermenev, A V,

Ketzer, B,

Toropin, A N,

Charitonidis, N,

Frolov, V N,

Peshekhonov, D V,

L Molina Bueno,

Bisio, P,

Ayala Torres, M A,

Zhevlakov, A S,

Kambar, Y,

Polyakov, V A,

Radics, B,

Banerjee, D,

Shchukin, D A,

Depero, E,

Matveev, V A,

Crivelli, P,

Tuzi, M,

Kirpichnikov, D V,

Mongillo, M,

R Mena Fredes,

Donskov, S V,

Gninenko, S N,

Kuleshov, S V,

Kachanov, V A,

Kramarenko, V A,

Bernhard, J,

Celentano, A,

Andreev, Yu M,

Samoylenko, V D,

Hosgen, M,

Tikhomirov, V O,

Oberhauser, B Banto,

Dusaev, R R,

Enik, T,

Kekelidze, G D,

Marsicano, L,

Krasnikov, N V,

Marini, A

2024

Overview

We present the first results from a proof-of-concept search for dark sectors via invisible decays of pseudoscalar \$\$ and \$'\$ mesons in the NA64h experiment at the CERN SPS. Our novel technique uses the charge-exchange reaction of 50 GeV \$^-\$ on nuclei of an active target as the source of neutral mesons. The \$ ' 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 \$2.910^9\$ pions on target accumulated during one day of data taking. This allows us to set a stringent limit on the branching ratio \$ Br(' invisible) < 2.1 10^-4\$ improving the current bound by a factor of \$3\$. We also set a limit on \$ Br( invisible) < 1.1 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.

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Publisher

Cornell University Library, arXiv.org

Subject

Charge exchange

/ Mesons

/ Particle decay

/ Pions

/ Synchrotrons