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

We calculate color screening mass in a thermalized and magnetized QCD matter in the frame of resummed perturbation theory, without restriction to the strength of the magnetic field $|qB|$. Different from the Debye screening in classical electrodynamics, the quantization of the quark transverse momentum $p_\perp^2=2n_L|qB|$ in the external magnetic field with the integer $n_L$ describing the...

The Lorentz boosted electromagnetic fields shrouding relativistic heavy ions can be treated as a flux of linearly polarized quasi-real photons. Therefore, ions can interact when their impact parameter is greater than twice the nuclear radius, the so-called ultraperipheral collisions (UPCs), via photon-photon process. This photon-photon process has also been observed in hadronic heavy-ion...

Recent experiments show that \Delta\gamma, an observable designed to detect the chiral magnetic effect (CME), in small collision systems (p+A) is similar to that in heavy ion collisions (A+A). This introduces a challenge to the existence of the CME because it is believed that no azimuthal correlation exists between the orientation of the magnetic field (\phi_B) and participant plane (\phi_2)...

Ultra-relativistic heavy ion collisions are expected to generate a huge electromagnetic (e.m.) field that is envisaged to induce several effects on hot QCD matter including the possibility of local parity and local parity and charge conjugation symmetry violations. A direct signature of such e.m. fields and a first quantitative measurement of its strength and lifetime are still missing. We...

Dielectrons are excellent probes of the Quark-Gluon Plasma (QGP) created in high-energy heavy-ion collisions. Because they can be produced at all stages of the collision system evolution and do not interact with the medium strongly, dielectrons carry the information from the initial stage to the final stage. In the low mass region ($\rm{ M_{ee} < M_{\phi} }$), the mass spectra of vector...

We study the lepton pair photoproduction in peripheral heavy-ion collisions based on the formalism in our previous work. We present the numerical results for the distributions of the transverse momentum, azimuthal angle and invariant mass for e+e− and µ+µ− pairs as functions of the impact parameter and other kinematic variables in Au+Au collisions. Our calculation incorporates the information...