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Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

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Published on: August 17, 2017

Search for Baryon-Number Violating Ξ_{b}^{0} Oscillations.

R Aaij¹, B Adeva², M Adinolfi³

¹European Organization for Nuclear Research (CERN), Geneva, Switzerland.

Physical Review Letters

|December 9, 2017

Summary

This summary is machine-generated.

Researchers searched for baryon-number violating oscillations in Xi_b0 (bottom strange baryon) particles using LHCb data. No evidence was found, setting a new upper limit on the oscillation rate.

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Area of Science:

High Energy Physics
Particle Physics
Quantum Mechanics

Background:

Baryon number conservation is a fundamental principle in particle physics.
The Standard Model of particle physics does not allow for baryon number violation.
Theoretical extensions to the Standard Model predict possible baryon number violating processes.

Purpose of the Study:

To search for evidence of baryon-number violating oscillations of the Xi_b0 (bottom strange baryon).
To set an upper limit on the oscillation rate of Xi_b0 particles if no evidence is found.

Main Methods:

Analysis of proton-proton collision data from the LHCb experiment.
Identification of Xi_b0 production through specific resonance decays (Xi_b*-, Xi_b'-).
Identification of Xi_b0 decay products to determine baryon number at decay (Xi_b0 -> Ξ_c+π−, Ξ_c+ → pK−π+).

Main Results:

No statistically significant evidence for baryon-number violating Xi_b0 oscillations was observed.
An upper limit at the 95% confidence level was set on the oscillation rate: ω < 0.08 ps⁻¹.

Conclusions:

The study places stringent constraints on theories predicting baryon number violation.
The findings are consistent with baryon number conservation in the studied energy regime.