中国物理学会高能物理分会第十一届全国会员代表大会暨学术年会

The existence of fractionally charged particles (FCP) in present is some extensions to the Standard Model of particle physics, and their detection would be a significant breakthrough. Most of the previous cosmic-rays (CRs) studies are mainly focused on the secondary CRs from the extensive air shower, but there is rarely on-orbit study to search FCP from primary CRs. The DArk Matter Particle...

A search for heavy Higgs bosons decaying into a pair of vector bosons and produced in association with a vector boson is performed, using final states with two leptons of the same electric charge (electrons or muons), missing transverse momentum and jets. A data sample of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider...

This talk will present a measurement of the charge conjugation and parity ($CP$) properties in the Higgs boson interaction with $\tau$ leptons. The study is based on a measurement of CP-sensitive angular observables defined by the visible decay products of tau lepton decays, performed using a data sample corresponding to 139 ifb of proton–proton collisions recorded at a center-of-mass energy...

Mass dimension one fermions are a new class of spin-half particles that are physically distinct from the Dirac fermions. They satisfy the Klein-Gordon but not the Dirac equation. They have mass dimension one instead of three-half thus endowing them with a renormalizable quartic self-interaction. Here, we report the recent progress of the theory as elucidated in Phys.Rept. 967 (2022) 1-43. ...

Differential cross-section measurements of $Z \gamma$ production in association with hadronic jets are presented, using the full Run-2 proton-proton dataset of 139 $fb^{-1}$ produced by the LHC at $\sqrt{s}$ = 13 TeV collected by the ATLAS detector. Distributions are measured using events in which the 𝑍 boson decays leptonically and the photon is predominantly radiated off the initial state...

This talk will present the latest result of precise measurement of Z+photon+jets differential cross sections and the probe of BSM new physics via anomalous neutral gauge couplings parameterized with EFT formalism at ATLAS.

This talk will present the latest searches for Mono-H125 and Mono-Scalar productions with SM and BSM Higgs as a direct probe to BSM portal of new physics and especially Dark Matter. A potential of utilizing the boosted Xbb tagger will be also discussed.

A search for singly-produced scalar leptoquarks decaying to $b\tau$ in proton-proton collisions is performed using Run 2 data from LHC corresponding to an integrated luminosity of 139 fb$^{-1}$ at $\sqrt{s}=$13 TeV recorded by the ATLAS detector. The signal benchmark model considered is a scalar leptoquark with an electric charge of 4/3$e$ and quantum numbers $3B+L=-2$, which decays...

This talk will present a search for scalar leptoquarks in btautau final state using a data sample corresponding to 139 ifb of proton–proton collisions recorded at a center-of-mass energy of $\sqrt{s}$= 13 TeV with the ATLAS detector at the Large Hadron Collider. The signal benchmark model considered is a scalar leptoquark with an electric charge of 4/3e and quantum numbers 3B + L = -2, which...

The large dataset collected by the ATLAS detector at allows to probe the presence of new physics that could enhance the rate of rare processes in the SM. The LHC can therefore gain considerable sensitivity for Flavour Changing Neutral Current (FCNC) interactions of the top quark. The ATLAS experiment has performed searches for FCNC couplings of the top quark with a photon, gluon, Z boson or...