A search is presented for hidden-sector bosons, χ, produced in the decay B0 → K∗(892)0 χ, with K∗(892)0 → K+ π− and χ → μ+ μ−. The search is performed using pp-collision data corresponding to 3.0 fb^−1 collected with the LHCb detector. No significant signal is observed in the accessible mass range 214 ≤ m(χ) ≤ 4350 MeV, and upper limits are placed on the branching fraction product B(B0 → K∗(892)0 χ) × B(χ → μ+ μ−) as a function of the mass and lifetime of the χ boson. These limits are of the order of 10^−9 for χ lifetimes less than 100 ps over most of the m(χ) range, and place the most stringent constraints to date on many theories that predict the existence of additional low-mass bosons.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Search for Hidden-Sector Bosons in B0 → K*0 μ+ μ− Decays. PHYSICAL REVIEW LETTERS, 115(16), 1-10 [10.1103/PhysRevLett.115.161802].

Search for Hidden-Sector Bosons in B0 → K*0 μ+ μ− Decays

Capriotti, L.;CARBONE, ANGELO;FERRARI, FABIO;GALLI, DOMENICO;MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;ZUCCHELLI, STEFANO
2015

Abstract

A search is presented for hidden-sector bosons, χ, produced in the decay B0 → K∗(892)0 χ, with K∗(892)0 → K+ π− and χ → μ+ μ−. The search is performed using pp-collision data corresponding to 3.0 fb^−1 collected with the LHCb detector. No significant signal is observed in the accessible mass range 214 ≤ m(χ) ≤ 4350 MeV, and upper limits are placed on the branching fraction product B(B0 → K∗(892)0 χ) × B(χ → μ+ μ−) as a function of the mass and lifetime of the χ boson. These limits are of the order of 10^−9 for χ lifetimes less than 100 ps over most of the m(χ) range, and place the most stringent constraints to date on many theories that predict the existence of additional low-mass bosons.
2015
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Search for Hidden-Sector Bosons in B0 → K*0 μ+ μ− Decays. PHYSICAL REVIEW LETTERS, 115(16), 1-10 [10.1103/PhysRevLett.115.161802].
Aaij, R.; Adeva, B.; Adinolfi, M.; Affolder, A.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Car...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/516624
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