Quasi-Periodic Pulsations and Coronal LoopsOscillations in an M-Class Solar Flare

We explored the oscillations in an M2.3 class solar flare on 2023December 14, including quasi-periodic pulsations (QPPs) in the light curvesand displacement oscillations in the coronal loops. Using the Bayesian-basedMarkov Chain Monte Carlo (MCMC) and wavelet analysis methods, QPPswere identified on the light curves of soft X-ray (SXR), hard X-ray (HXR) andextreme ultraviolet (EUV) with a period around one minute (58-72 s). Highcorrelations found between SXR and HXR QPPs indicating that they could beassociated with a periodical injection of nonthermal electrons. However, we donot find the time delay between SXR and HXR QPPs. Meanwhile, after the flaremaximum, two coronal loops rooted in the flare region display the expansionsand oscillations with periods of 3.6 min and 8.2 min until the flare ending. Ourobservations suggest that the loop oscillations are most likely the standing kinkmode waves. The magnetic field strength in the loops was estimated to be 16 G via the coronal seismology. We do not find the observational evidences to showthe physical correlation between QPPs and loop oscillations in this event.