• Lisha
• Neelu Mahajan

Long-baseline neutrino experiments have played a central role in advancing the understanding of neutrino oscillations, evolving from the first experimental confirmation of neutrino flavor transformation to the present search for leptonic CP violation. This review presents a comprehensive overview of the development of long-baseline accelerator experiments, organized by their major scientific eras: the foundational era of oscillation discovery; the precision oscillation era; the current era focused on electron-neutrino appearance and the search for CP violation; and the next-generation experimental era. The search for CP violation in the neutrino sector remains one of the most important objectives of contemporary particle physics, as a non-zero leptonic CP-violating phase δ_CPwould imply different oscillation behaviors for neutrinos and antineutrinos and could provide important insights into the origin of the matter-antimatter asymmetry of the Universe. This review summarizes the experimental framework for investigating leptonic CP violation and discusses the capabilities, major achievements, and current status of long-baseline experiments, including K2K, MINOS, T2K, and NOvA, together with the physics goals and expected sensitivities of next-generation facilities such as DUNE and Hyper-Kamiokande. The experimental challenges associated with precision measurements of the CP-violating phase are also discussed, highlighting the expected role of future long-baseline experiments in establishing CP violation in the neutrino sector.

CP Violation, Long-baseline experiments, CP-violating phases, mass squared differences.

"LONG BASELINE NEUTRINO EXPERIMENTS: ADVANCING THE PRECISION ERA", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.13, Issue 9, page no.109-113, September-2026, Available :http://www.jetir.org/papers/JETIRHX06017.pdf

"LONG BASELINE NEUTRINO EXPERIMENTS: ADVANCING THE PRECISION ERA", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.13, Issue 9, page no. pp109-113, September-2026, Available at : http://www.jetir.org/papers/JETIRHX06017.pdf