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    Electromagnetic trace anomaly in a generalized linear sigma model

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    Electromagnetic trace anomaly_Final.pdf (217.7Kb)
    Date
    2017
    Author
    Fariborz, Amir H.
    Jora, Renata
    Publisher
    American Physical Society
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    Abstract
    We build the electromagnetic trace anomaly effective term for a generalized linear sigma model with two chiral nonets, one with a quark-antiquark structure and the other one with a four-quark content. In the leading order of this framework, we study the decays into two photons of the lowest isosinglet scalar mesons. We find that the direct inclusion of underlying mixing among two- and four-quark components in the trace anomaly term is essential in order for the model prediction to agree with the available experimental data on the decay width of f0ð980Þ to two photons. Consequently, this sets a lower bound of 0.5 KeVon the decay with of f0ð500Þ to two photons.
    URI
    http://hdl.handle.net/1951/69525
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    • SUNY Polytechnic Institute Faculty and Staff Research, Publications, and Creative Works [63]

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