Summary
This paper reports a null result from a search for the X(5568) narrow resonance structure in B_s^0π± decay using ATLAS detector data from pp collisions at 7 and 8 TeV. No significant evidence was found for the resonance previously reported by the D0 Collaboration, with stringent upper limits placed on both absolute and relative production rates. The findings constrain theoretical models predicting exotic four-quark or pentaquark states in B meson decays.
UK applicability
This is fundamental particle physics research conducted at the international Large Hadron Collider facility; findings are not directly applicable to UK agricultural, soil, or nutritional policy or practice.
Key measures
Upper limits on signal events N(X)<382 and N(X)<356; upper limits on production rate ratio ρ_X<0.015 and ρ_X<0.016; integrated luminosity analysed: 24.4 fb⁻¹ (4.9 fb⁻¹ at 7 TeV and 19.5 fb⁻¹ at 8 TeV)
Outcomes reported
The study searched for the narrow X(5568) resonance structure in B_s^0π± decay using ATLAS detector data and found no significant signal. Upper limits were set on the number of signal events and the production rate relative to B_s^0 mesons at 95% confidence level.
Topic tags
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