Narrow Results

We report some preliminary differential cross section results for the γd → K_SΛ(p) reaction using a circularly-polarized photon beam and an unpolarized LD₂ target. The data was collected at the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. For this study the photon energy ranged from 1.3 to 2.53 GeV, which covers from the reaction threshold through the nucleon resonance regimes. The acceptance- and flux-corrected yields show peaks at the center-of mass energies W = 1.7 and W = 1.9 GeV. These first-time results will aid in unraveling the spectrum of non-strange excited baryons.

The preliminary results on multihadron processes obtained with the SND detector at the e⁺e⁻ collider VEPP-2000 in the energy range from 1 to 2 GeV are presented. The results are interesting in connection with their contribution to the total hadronic cross section, the muon g-2 and a possibility to study excited vector mesons properties. The nucleon anti-nucleon production was also studied.

A number of production cross sections for electron-positron annihilation to a hadronic final state have been measured using the Belle dataset, which is possible given the general purpose design of the Belle detector and its large solid-angle coverage. The cross section measurements predominantly fall above 3 GeV, which still leaves the opportunity for using the dataset to systematically measure cross sections below 3 GeV. These low-energy cross sections are important for improving the precision of the Standard Model prediction for the muon anomalous magnetic moment.

With the development of experiments in particle accelerators, there have been many new particles discovered. Some of these new particles are called exotic particles and are predicted by Quantum Chromodynamics (QCD). There are various models for the study of these particles, and a possible way to study the exotic particle production is through the study of meson production in two-photon interactions at high-energy collisions due his clean experimental signal. In this contribution, we calculate the meson production in two-photon interactions at LHC energies considering proton-proton collisions to estimate the total cross section for the production of exotic states.

The Large Hadron Collider at CERN allows us to study heavy-ion collisions at an un- precedented energy. ALICE, A Large Ion Collider Experiment, is the experiment ded- icated to the investigation of heavy-ion collisions. In this contribution, recent open heavy-flavour results from pp collisions at $\sqrt{s}$= 5.02, 7, 8 and 13 TeV and p–Pb collisions at $\sqrt{s_{\mathrm{\text{NN}}}}$ = 5.02 TeV, collected with the ALICE detector during the LHC Run-1 and Run-2 are presented. The results include the production cross section, nuclear modification factor and multiplicity dependence studies of production of D mesons and electrons from heavy-flavour hadron decays at mid-rapidity and of muons from heavy-flavour hadron decays at forward rapidity. Charm production was measured down to $p_{\mathrm{\text{T}}}$ = 0 GeV/$c$ in pp and p–Pb collisions. Recent measurements of the production cross section of heavy charmed baryons such as ${\mathrm{\Lambda }}_c$ (in pp and p–Pb) and ${\mathrm{\Xi }}_c$ (in pp) are discussed. The results are compared with theoretical model predictions.

Measurements of cross sections and couplings of the Higgs boson using the ATLAS detector at CERN’s LHC are presented. Data from proton proton collisions at $\sqrt{s}=7$, 8 and 13 TeV are discussed. A range of production and decay couplings can be tested with a precision that depends on the generality of the assumptions made. Data at 7 and 8 TeV are also combined with CMS results to enhance the precision. The results are all consistent with predictions of the Standard Model.