2561 DPyC SMF false [["minutes", "Minutes"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]] Cinvestav ea481e58ca9c64e14d7982cb66bcd604 3312 The Division of Particles and Fields of the Mexican Physical Society (DPyC-SMF) organizes every year the Annual Meeting (RADPyC). This space is dedicated mainly for the exposure of results of graduate students and young researchers working in high energy physics and includes some review talks on the hot topics of the field. This year the meeting will be held in Auditorio José Ádem, Cinvestav, Mexico City, México. The scientific programme will consist of invited and contributed talks, and a poster session. It will begin in the morning of Wednesday 17 June and end before lunch on Friday 19 June. We will have the following invited talks: - Ana Colmenero, HAWC (UMSNH) - Jens Erler, The EW SM and constraints on NP (Mainz, PRISMA) - Iván Martínez Soler, Neutrino physics (Durham Univ.) - Cristina Oropeza, CMS (Ibero) - Antonio Ortiz, ALICE (ICN-UNAM) - Gabriel Palacios, Accelerator physics (UNAM) - Antonio Pich, Flavor physics (IFIC) - Pedro Podesta, Belle-II (UAS) - Selomit Ramírez, QCD, Loop Tree Duality, Quantum Computing (UAS) - Saúl Ramos, Flavor physics from a top-down perspective (IF-UNAM) - Alfredo Raya, NICA (UMSNH) - Eric Vázquez, DM-neutrinos (exp.) (IF-UNAM) The whole event can be followed by Zoom: https://us02web.zoom.us/j/85815121456?pwd=t1JWdqhgarEQRyewmXIEzNlkIcqU8a.1 (858 1512 1456 & 044752). Due to recent internet security problems at Cinvestav it will NOT be broadcasted via the DPyC facebook account (facebook is currently blocked on our premises). False 2026-06-17T09:00:00 2026-06-19T14:30:00 2026-03-23T09:50:55 2026-06-19T17:51:55 Mexico/General cinvestav f09241183e84638d226a8885656239cd Cinvestav 6be00aeecce15d4b2547496f45352003 CINVESTAV-IPN Mexico 207484e6583dd9c0c1af2f52ce04fdd8 Cinvestav ea481e58ca9c64e14d7982cb66bcd604 Cinvestav 3cd3ab69a079e614c15e4c750e7d3d60 BUAP 5848375cb8b0db28e94350f19dcb744f Benemérita Universidad Autónoma de Puebla 65efd11437264d48aa1f7486255a57bc 20 false [["minutes", "Minutes"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]] Facultad de Ciencias Físico Matemáticas BUAP f002944728911bc60c6fa337bdea4899 Facultad de Ciencias Físico Matemáticas BUAP f002944728911bc60c6fa337bdea4899 Instituto de Física “Ing. Luis Rivera Terrazas”, Benemérita Universidad Autónoma de Puebla (IFUAP-BUAP) 3ab06f7030ec292f73eb7c9d07f0abc8 00:15 The Unruh effect predicts that a uniformly accelerated observer perceives a change in their vacuum state [1]. This phenomenon is a direct result of quantum field theory and relativity. Although direct experimental confirmation is still pending, interesting proposals already exist [2]. Currently, there is debate about the physical origin of the effect [3], particularly regarding whether it should be interpreted as a consequence of acceleration present since arbitrarily remote times, or of sudden acceleration. The first case could occur in cosmological contexts, and the second in possible artificial realizations. In this work, we claim that particle production requires sudden acceleration. In this scenario, starting from rest with a preselected initial state, we conclude that acceleration induces a non-trivial change in the observables. This is reflected in the expectation value of the particle number. There are, therefore, two equivalent descriptions: transforming the observables or transforming the states, both leading to the same physical results. Furthermore, in a cosmological context, the system would have always evolved within a closed dynamics and would effectively remain in thermal equilibrium. Consequently, particle production would no longer manifest at late times after equilibrium is reached. To test our hypothesis, we introduce a metric defined by an adiabaticity parameter $\lambda$, that continuously connects the flat Minkowski spacetime metric with the Rindler observer metric (constant acceleration). This new metric corresponds to a curvilinear coordinate system associated with new adiabatically accelerated observers. Under these conditions, we analyze the first-order corrections in $\lambda$ to the solutions of the resulting Klein–Gordon equations and study how these corrections modify the Bogoliubov coefficients that relate the creation and annihilation operators between the accelerated and inertial frames. By calculating the transition coefficients between modes using the Klein–Gordon inner product, we find that in the adiabatic limit $\lambda\rightarrow 0$, these coefficients tend to zero, as expected in flat spacetime, indicating the absence of particle production. In contrast, in the sudden acceleration limit $\lambda\rightarrow \infty$, we recover the result associated with the Rindler metric. Our results show that particle production in the Unruh effect depends essentially on the non-adiabatic nature of the acceleration and not on acceleration alone. These results continue our previous line of research on the Unruh effect [4,5]. [1] L. C. B. Crispino, Atsushi Higuchi, and G. E. A. Matsas. The Unruh effect and its applications. Rev. Mod. Phys., 80:787–838, 2008. doi: 10.1103/RevModPhys.80.787. [2] M. H. Lynch, E. Cohen, Y. Hadad, and I. Kaminer. Experimental Evidence for the Unruh Effect. In 2020 Conference on Lasers and Electro-Optics, 5 2020. [3] R. F. O’Connell, Demise of Unruh radiation, Modern Physics Letters A 35, 2050329 (2020). [4] M. A. Estévez and E. Sadurni. Particle radiation produced by accelerated systems and their analogy with damped oscillators. Rev. Mex. Fis. S, 4(2):1–4, 2022. [5] M. A. Estévez and E. Sadurní, The effects of boundary conditions on Rindler's spectral anomaly, accepted for publication, arXiv:2602.07323 [gr-qc] (2026).