QCD sum rule studies of $$s s {\bar{s}} {\bar{s}}$$ s s s ¯ s ¯ tetraquark states with $$J^{PC} = 1^{+-}$$ J PC = 1 + -

S=+1 pentaquarks in QCD sum rules

Pentaquark states with strangeness S = +1 and IJπ = 0 2 ± ,1 1 2 ± ,0 2 ± ,1 2 ± are investigated using the QCD sum rule technique. Throughout the calculation, we emphasize the importance of the establishment of a valid Borel window, which corresponds to a region of the Borel mass, where the operator product expansion (OPE) converges and the presumed ground state pole dominates the sum rules. W...

Study of ( 3 S , 2 S ) ( 1 S ) and ( 3 S , 2 S ) [ superscript + ] [ superscript - ] ( 1 S ) hadronic transitions

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▲ ❡ ♥♦♠❜r ❡ ❞ ❡ s✉❥❡ts ❞❛♥s ❧❡s ♣❛♥❡❧s ❞✬❛♥❛❧s ❡ s❡♥s♦r✐❡❧❧ ❡ ✿ ✉♥ ❡ ❛♣♣r♦❝❤ ❡ ❜❛s ❡ ❞ ❡ ❞♦♥♥é❡s

Defining for each of these processes a ratio of B̄ s and B s amplitudes , R s 1 ≡ Ā s 1 A s 1 , R ′ s 1 ≡ Ā ′ s 1 A ′ s

Michael Gronau, 2 Dan Pirjol, Amarjit Soni, and Jure Zupan 6 Physics Department, Technion–Israel Institute of Technology 32000 Haifa, Israel Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309 Center for Theoretical Physics, Massachusetts Institute for Technology, Cambridge, MA 02139 Physics Department, Brookhaven National Laboratory, Upton, New York 11973 5 Department o...

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