65 research outputs found
Dark sector and Axion-like particle search at BESIII
Dark matter (DM) refers to a new type of matter that may explain observed
rotation curves of galaxies and the composite structure of the Universe. It may
couple to the Standard Model particles via portals, which include the
possibility of axion-like particle, light Higgs boson, dark photon and spin-1/2
fermions. The axion-like particle and light Higgs boson can be accessible via
radiative decays of while the dark photon via initial-state radiation
process using the data of high-intensity collider experiments, such as
the BESIII experiment. DM may be depicted as baryonic matter in an invisible
final state. The presence of a massless dark photon, predicted by the
spontaneous broken of Abelian group , may enhance the branching
fractions of rare flavor changing neutral current decay processes. BESIII
experiment has recently explored the possibility of these DM scenarios using
the data samples collected at several energy points, including and
resonances. This report summarizes the recent results of the
BESIII experiment related to the dark-sector and Axion-like particles.Comment: 6 pages, 5 figures, Proceeding of Lepton Photon 202
Study of photon detection efficiency and position resolution of BESIII electromagnetic calorimeter
We study the photon detection efficiency and position resolution of the
electromagnetic calorimeter (EMC) of the BESIII experiment. The control sample
of the initial-state-radiation (ISR) process of is used at and resonances for the EMC
calibration and photon detection efficiency study. Photon detection efficiency
is defined as the predicted photon, obtained by performing a kinematic fit with
two muon tracks, matched with real photons in the EMC. The spatial resolution
of the EMC is defined as the separation in polar () and azimuthal
() angles between charged track and associated cluster centroid on the
front face of the EMC crystals.Comment: 5 page
Dark sector and Axion-like particle search at BESIII
Dark matter (DM) refers to a new type of matter that may explain observed rotation curves of galaxies and the composite structure of the Universe. It may couple to the Standard Model particles via portals, which include the possibility of axion-like particle, light Higgs boson, dark photon and spin-1/2 fermions. The axion-like particle and light Higgs boson can be accessible via radiative decays of while the dark photon via initial-state radiation process using the data of high-intensity collider experiments, such as the BESIII experiment. DM may be depicted as baryonic matter in an invisible final state. The presence of a massless dark photon, predicted by the spontaneous broken of Abelian group , may enhance the branching fractions of rare flavor changing neutral current decay processes. BESIII experiment has recently explored the possibility of these DM scenarios using the data samples collected at several energy points, including and resonances. This report summarizes the recent results of the BESIII experiment related to the dark-sector and Axion-like particles
Dark sector and Axion-like particle search at BESIII
Dark matter (DM) refers to a new type of matter that may explain observed rotation curves of galaxies and the composite structure of the Universe. It may couple to the Standard Model particles via portals, which include the possibility of axion-like particle, light Higgs boson, dark photon and spin-1/2 fermions. The axion-like particle and light Higgs boson can be accessible via radiative decays of while the dark photon via initial-state radiation process using the data of high-intensity collider experiments, such as the BESIII experiment. DM may be depicted as baryonic matter in an invisible final state. The presence of a massless dark photon, predicted by the spontaneous broken of Abelian group , may enhance the branching fractions of rare flavor changing neutral current decay processes. BESIII experiment has recently explored the possibility of these DM scenarios using the data samples collected at several energy points, including and resonances. This report summarizes the recent results of the BESIII experiment related to the dark-sector and Axion-like particles
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