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Abstract: We study interactions of unparticles ${\cal {U}}$ of dimension $d {\cal {U}}$due to Georgi with Standard Model (SM) fields through effective operators. Theunparticles describe the low energy physics of a non-trivial scale invariantsector. Since unparticles come from beyond the SM physics, it is plausible thatthey transform as a singlet under the SM gauge group. This helps tremendouslyin limiting possible interactions. We analyze interactions of scalar ${\cal{U}}$, vector ${\cal {U}}$$^\mu$ and spinor ${\cal {U}}$$^s$ unparticles withSM fields and derivatives up to dimension four. Using these operators, wediscuss different features of producing unparticles at $e^+ e^-$ collider andother phenomenologies. It is possible to distinguish different unparticlesproduced at $e^+e^-$ collider by looking at various distributions of productioncross sections.



Autor: Shao-Long Chen, Xiao-Gang He

Fuente: https://arxiv.org/







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