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The θ-angle and axion physics of two-color QCD at fixed baryon charge / Bersini, Jahmall (Boskovic Inst., Zagreb) ; D'Alise, Alessandra (Naples U. ; INFN, Naples) ; Sannino, Francesco (Southern Denmark U., CP3-Origins ; SSM, Naples ; Naples U. ; INFN, Naples ; CERN) ; Torres, Matías (Naples U. ; INFN, Naples)
We analyze the impact of the $\theta$-angle and axion dynamics for two-color (in fact any $Sp(2N)$) QCD at nonzero baryon charge and as a function of the number of matter fields on the vacuum properties, the pattern of chiral symmetry breaking as well as the spectrum of the theory. We show that the vacuum acquires a rich structure when the underlying $CP$ violating topological operator is added to the theory. [...]
arXiv:2208.09226; RBI-ThPhys-2022-31.- 2022-11-15 - 29 p. - Published in : JHEP 2211 (2022) 080 Fulltext: document - PDF; 2208.09226 - PDF;

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Charging the conformal window at nonzero <math display="inline"><mi>θ</mi></math> angle / Bersini, Jahmall (Boskovic Inst., Zagreb ; Tokyo U., IPMU) ; D'Alise, Alessandra (Naples U. ; INFN, Naples) ; Sannino, Francesco (Naples U. ; Southern Denmark U., CP3-Origins ; U. Southern Denmark, Odense, DIAS ; SSM, Naples ; CERN) ; Torres, Matías (Naples U.)
We determine the impact of the $\theta$-angle and axion physics on the near conformal dynamics of the large-charge baryon sector of $SU(2)$ gauge theories with $N_f$ fermions in the fundamental representation. We employ an effective approach featuring Goldstone and dilaton degrees of freedom augmented by the topological terms in the theory. [...]
arXiv:2208.09227; RBI-ThPhys-2022-32.- 2023-06-15 - 18 p. - Published in : Phys. Rev. D 107 (2023) 12 Fulltext: 2208.09227 - PDF; JHEP11(2022)080 - PDF;

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The analytic structure of the fixed charge expansion / Antipin, Oleg (Boskovic Inst., Zagreb) ; Bersini, Jahmall (Boskovic Inst., Zagreb) ; Sannino, Francesco (Southern Denmark U., CP3-Origins ; SSM, Naples ; Naples U. ; INFN, Naples ; CERN) ; Torres, Matías (Naples U. ; INFN, Naples)
We investigate the analytic properties of the fixed charge expansion for a number of conformal field theories in different space-time dimensions. The models investigated here are $O(N)$ and $QED_3$. [...]
arXiv:2202.13165; RBI-ThPhys-2022-6; CERN-TH-2022-049.- 2022-06-08 - 24 p. - Published in : JHEP 2206 (2022) 041 Fulltext: document - PDF; 2202.13165 - PDF;

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