2026-09-21T19:28:40Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/121265 2025-08-04 col_2142_5131 col_2142_8859 com_2142_5130 com_2142_8858 com_2142_234

Pitts, Kevin Neubauer, Mark Cooper, Lance Kahn, Yonatan 2023-08 application/pdf en text Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01 The student, Adithya Kuchibhotla, accepted the attached license on 2023-07-12 at 15:22. The student, Adithya Kuchibhotla, submitted this Dissertation for approval on 2023-07-12 at 15:28. This Dissertation was approved for publication on 2023-07-13 at 16:26. DSpace SAF Submission Ingestion Package generated from Vireo submission #19659 on 2023-12-04 at 17:35:14 Search for doubly-charmed baryons in CDF data Kuchibhotla, Adithya 2023-07-13 Physics Particle Physics Cdf Baryons Doubly-charmed Baryons Tevatron The production mechanisms of doubly-charmed baryons $\mathit{\Xi_{cc}^{+/++}}$ are not well understood. There is a strong motivation to validate the results of the detection of doubly-charmed baryons from experiments such as SELEX and LHCb, not only because the results from the two experiments are in conflict, but also to better understand the workings of Quantum Chromodynamics in their production. This work describes a search for doubly-charmed baryons in CDF Run II data, both in the six-track final state mode of $\mathit{\Xi_{cc}^{++}\rightarrow \Lambda_c^+K^-\pi^+\pi^+}$ and the five-track state of $\mathit{\Xi_{cc}^{+}\rightarrow \Lambda_c^+K^-\pi^+}$. The decay mode of another six-track final state $\mathit{\Lambda_{b}^{\mathrm{0}}\rightarrow \Lambda_c^+\pi^-\pi^+\pi^-}$ is used as a reference signal. The search was performed on the CDF data with selection criteria optimized for the $\mathit{\Lambda_{b}^{\mathrm{0}}\rightarrow \Lambda_c^+\pi^-\pi^+\pi^-}$ decay mode. The search did not result in a significant detection of either of the two doubly-charmed baryons. In the absence of a signal, an upper limit on the branching fraction ratio $\dfrac{\mathcal{B}(\mathit{\Xi_{cc}^{++}\rightarrow\Lambda_c^+ K^- \pi^+ \pi^+)}}{\mathcal{B}(\mathit{\Lambda_b^{\mathrm{0}}\rightarrow \Lambda_c^+ \pi^+ \pi^- \pi^-)}}\dfrac{\mathit{\sigma(\Xi_{cc}^{++})}}{\mathit{\sigma(\Lambda_b^{\mathrm{0}})}}$ is estimated as 24.18 (20.49) with 95\% (90\%) confidence level. Text eng https://hdl.handle.net/2142/121265 Copyright 2023 Adithya Kuchibhotla Ph.D. Dissertation Physics University of Illinois at Urbana-Champaign Physics