Search for doubly-charmed baryons in CDF data

The production mechanisms of doubly-charmed baryons \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 \Xi_cc⁺⁺\rightarrow \Lambda_c⁺K^-π⁺π⁺ and the five-track state of \Xi_cc⁺\rightarrow \Lambda_c⁺K^-π⁺. The decay mode of another six-track final state \Lambda_b⁰\rightarrow \Lambda_c⁺π^-π⁺π^- is used as a reference signal. The search was performed on the CDF data with selection criteria optimized for the \Lambda_b⁰\rightarrow \Lambda_c⁺π^-π⁺π^- 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}(\Xi_cc⁺⁺\rightarrow\Lambda_c⁺ K^- π⁺ π⁺)}{\mathcal{B}(\Lambda_b⁰\rightarrow \Lambda_c⁺ π⁺ π^- π^-)}\dfrac{σ(\Xi_cc⁺⁺)}{σ(\Lambda_b⁰)} is estimated as 24.18 (20.49) with 95\% (90\%) confidence level.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2023

Author dc:creator

• Kuchibhotla, Adithya

Contributors dc:contributor

• Pitts, Kevin
• Neubauer, Mark
• Cooper, Lance
• Kahn, Yonatan

• Physics
• Particle Physics
• Cdf
• Baryons
• Doubly-charmed Baryons
• Tevatron

Statement dc:rights

• Copyright 2023 Adithya Kuchibhotla

Language dc:language

en, eng

Handle dc:identifier

https://hdl.handle.net/2142/121265

OAI record oai:identifier

https://www.ideals.illinois.edu/oai-pmh?verb=GetRecord&metadataPrefix=etdms&identifier=oai%3Awww.ideals.illinois.edu%3A2142%2F121265