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e^+e^- →charm cross sections via ISR

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Chinese physics C 2010年第6期34卷 656-659页

作者： Galina Pakhlova Institute for theoretical and experimental physics

We discuss recent measurements of exclusive e^＋e^- cross sections for charmed hadron final states near threshold performed by Belle and BABAR. The results are based on a study of events with initial-stateradiation photons in a large data sample collected with the Belle and BABAR detectors at the T（4S） resonance and nearby continuum.

关键词： charmonium states open charm threshold cross section

Hadron spectroscopy from B-factories

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Chinese physics C 2010年第9期34卷 1195-1200页

作者： G.Pakhlova Institute for theoretical and experimental physics(Russia)

We review the recent experimental results on hadron spectroscopy from B-factories focusing on the exotic charmonium-like *** them we discuss the X（3872）,Y（3940）,Z（4430）＋,Z（4050）＋,Z（4250）＋ and Y（4140） states found in B-meson decays,the X（3940） and X（4160） states produced in double charmonium production,the Y（4260）,Y（4325）,Y（4660） and X（4630） states produced with initial-state radiation in e ＋ eannihilation and the X（3915）,Y（4350） states observed in two-photon collisions.

关键词： hadron spectroscopy charmonium charmonium-like states charm mesons cross section

Investigation of self-generated magnetic ﬁeld and dynamics of a pulsed plasma ﬂow

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Plasma Science and Technology 2022年第5期24卷 146-153页

作者： Aigerim TAZHEN Merlan DOSBOLAYEV Tlekkabul RAMAZANOV Institute of experimental and theoretical physics Al-Farabi Kazakh National UniversityAlmaty 050040Kazakhstan

Due to the growing interest in studying the compression and disruption of the plasma filament in magnetic fusion devices and Z-pinches, this work may be important for new developments in the field of controlled thermonuclear fusion. Recently, on a coaxial plasma accelerator, we managed to obtain the relatively long-lived(~300 μs) plasma filaments with its self-magnetic field. This was achieved after modification of the experimental setup by using high-capacitive and lowinductive energy storage capacitor banks, as well as electrical cables with low reactive impedance. Furthermore, we were able to avoid the reverse reflection of the plasma flux from the end of the plasma accelerator by installing a special plasma-absorbing target. Thus, these constructive changes of the experimental setup allowed us to investigate the physical properties of the plasma filament by using the comprehensive diagnostics including Rogowski coil,magnetic probes, and Faraday cup. As a result, such important plasma parameters as density of ions and temperature of electrons in plasma flux, time dependent plasma filament’s azimuthal magnetic field were measured in discharge gap and at a distance of 23.5 cm from the tip of the cathode. In addition, the current oscillograms and Ⅰ–Ⅴ characteristics of the plasma accelerator were obtained. In the experiments, we also observed the charge separation during the acceleration of plasma flow via oscillograms of electron and ion beam currents.

关键词： coaxial plasma accelerator pulsed plasmaﬂow self magneticﬁeld electron density electron temperature Faraday cup magnetic probe

Production of charmonium(like) states in e^+ e^- interactions

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Chinese physics C 2008年第6期32卷 488-491页

作者： P.Pakhlov Institute for theoretical and experimental physics B.Cheremushkinskaya25117218MoscowRussia

We present a search for new charmonium like states in e^＋e^- annihilation using the initial-state radiation and the process e^＋e^- →J/ψ D（^＊）D（^＊）. The analyses are based on a huge data sample recorded near ... 详细信息

关键词： charmonium new states e^+e^- annihilation initial state radiation

Study of the gluonic quartic gauge couplings at muon colliders

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Communications in theoretical physics 2023年第11期75卷 66-75页

作者： Ji-Chong Yang Yu-Chen Guo Yi-Fei Dong Department of physics Liaoning Normal UniversityDalian 116029China Center for theoretical and experimental High Energy physics Liaoning Normal UniversityDalian 116029China

The potential of muon colliders opens up new possibilities for the exploration of new physics beyond the Standard *** is worthwhile to investigate whether muon colliders are suitable for studying gluonic quartic gauge couplings(gQGCs),which can be contributed by dimension-8 operators in the framework of the Standard Model effective field theory,and are intensively studied *** this paper,we study the sensitivity of the processμ^(+)μ^(-)→jjν■to *** results indicate that the muon colliders with *** larger than 4 TeV can be more sensitive to gQGCs than the Large Hadron Collider.

关键词： gluonic quartic gauge coupling(gQGC) effective field theory(EFT) muon collider Vector Boson Fusion(VBF)

0^(--) hidden-heavy tetraquark states via QCD sum rules

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Chinese physics C 2024年第9期48卷 50-59页

作者： Bing-Dong Wan Hong-Tai Xu Department of physics Liaoning Normal UniversityDalian 116029China Center for theoretical and experimental High Energy physics Liaoning Normal UniversityDalian 116029China

In this study,we evaluated the mass spectra of the prospective 0^(--) hidden-charm and hidden-bottom tetraquark states in molecular configuration via QCD sum *** our calculation,the nonperturbative condensate contributions are considered up to dimension eight in operator product *** is found that there could exist 4possible 0^(--) hidden-charm tetraquark states with masses(4.68±0.07),(4.22±0.09),(4.53±0.09),and(4.26±0.13) *** corresponding hidden-bottom partners are found lying at(11.04±0.10),(10.71±0.12),(11.09±0.10),and(11.82±0.14) GeV,*** possible tetraquark decay modes were analyzed,which are expected to be measured in BESⅢ,BELLEⅡ,and LHCb experiments.

关键词： exotic hadronic states QCD sum rules tetraquarks

Effects of the phase variation and high-order momentum transfer components of NN amplitude on p-~4He elastic scattering

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Nuclear Science and Techniques 2018年第1期29卷 65-76页

作者： I.M.A.Tag-Eldin M.M.Taha S.S.A.Hassan Nuclear experimental physics Department Nuclear Research Center Atomic Energy Authority Mathematics and theoretical physics Department Nuclear Research Center Atomic Energy Authority

Elastic scattering differential cross sections for a p- ~4He system are calculated within the framework of optical limit approximation of the Glauber multiple scattering model. Three different ranges for proton energy(E_(lab)), 19〈E_(lab)〈50 Me V, 100≤E_(lab)≤1730 Me V, and 45 ≤E_(lab)≤393 Ge V are considered. It is shown that the Pauli blocking fails to describe the data up to the proton energy, E_(lab)〈100 Me V. For higher proton energies, a qualitative agreement is obtained. The observed elastic scattering differential cross section is nicely reproduced in the whole range of scattering angles in the center of mass system up to Θ_(c.m.)〈200° for 19〈E_(lab) ≤100 Me V when the effect of both the nucleon–nucleon(NN) phase variation parameter γNN and higher-order momentum transfer components(λ_n; n = 1 and 2) of(NN) elastic scattering amplitude is included. In the range of 200 E_(lab) 1730 Me V, introducing λ_n plays a significant role in describing the data up to the momentum transfer, q^2≤1:2(Ge V/c)~***, it is found that considering only the effect of phase variation parameter, cNN, improved the agreement in the region of minima for elastic scattering differential cross section for 45≤E_(lab)≤393 Ge V. The values of cNNand kn as a function of incident proton energies are presented.

关键词： Elastic scattering Optical limit approximation Glauber multiple scattering model

Searching for the light leptophilic gauge boson Zx via four-lepton final states at the CEPC

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Chinese physics C 2024年第4期48卷 59-67页

作者：岳崇兴李妍钰王美舒羽张欣蒙 Department of physics Liaoning Normal UniversityDalian 116029China Center for theoretical and experimental High Energy physics Liaoning Normal UniversityDalian 116029China

We investigate the possibility of detecting the leptophilic gauge boson Z_(x) predicted by the U(1)Le−Lμmodel via the processes e+e−→ℓ^(+)ℓ^(−)Z_(x)(Z_(x)→ℓ^(+)ℓ^(−))and e+e−→ℓ^(+)ℓ^(−)Z_(x)(Z_(x)→νℓ¯νℓ)at the Circular Electron Positron Collider(CEPC)with a center of mass energy√s=240 GeV and luminosity L=5.6ab^(−1).We provide the expected sensitivities of the CEPC to the parameter space at the 1σ,2σ,3σ,and 5σlevels.

关键词： light gauge boson Z_(x) U(1)L_(e)-L_(μ)model Circular Electron Positron Collider

Charged-current non-standard neutrino interactions at the LHC and HL-LHC

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Chinese physics C 2023年第4期47卷 132-147页

作者：岳崇兴程雪佳杨冀翀 Department of physics Liaoning Normal UniversityDalian 116029China Center for theoretical and experimental High Energy physics Liaoning Normal UniversityDalian 116029China

A series of new physics scenarios predict the existence of the extra charged gauge boson W’,which can induce charged-current(CC)non-standard neutrino interactions(NSIs).The theoretical constraints on the simplified W’model and further on the CC NSI parameters ε_(αβ)^-qq'Y from partial wave unitarity and W’decays are *** sensitivity of the process pp→W’→lv to the W’model at the LHC and high-luminosity(HL)LHC experiments is investigated by estimating the expected constraints on ε_(αβ)^-qq'Y (α=β=e orμ)using a Monte-Carlo(MC)*** find that the interference effect plays an important role,and the LHC can strongly constrain ε_(αβ)^-qq'L .Compared with those at the 13 TeV LHC with L=139 fb^(-1),the expected constraints at the 14TeV LHC with L=3 ab^(-1)can be strengthened to approximately one order of magnitude.

关键词： high energy collider new gaugen boson W′ charged-current non-standard neutrino interactions