Topological susceptibility of Nf=2+1 QCD from staggered fermions spectral projectors at high temperatures

被引：18

作者：

Athenodorou, Andreas ^{[1
,2
,3
]}

Bonanno, Claudio ^{[4
]}

Bonati, Claudio ^{[1
,2
]}

Clemente, Giuseppe ^{[5
]}

D'Angelo, Francesco ^{[1
,2
]}

D'Elia, Massimo ^{[1
,2
]}

Maio, Lorenzo ^{[1
,2
]}

Martinelli, Guido ^{[6
,7
]}

Sanfilippo, Francesco ^{[8
]}

Todaro, Antonino ^{[9
,10
,11
]}

机构：

[1] Univ Pisa, Largo B Pontecorvo 3, I-56127 Pisa, Italy

[2] Ist Nazl Fis Nucl, Sez Pisa, Largo B Pontecorvo 3, I-56127 Pisa, Italy

[3] Cyprus Inst, Computat Based Sci & Technol Res Ctr, 20 Kavafi Str, CY-2121 Nicosia, Cyprus

[4] Ist Nazl Fis Nucl, Sez Firenze, Via G Sansone 1, I-50019 Florence, Italy

[5] DESY, Platanenallee 6, D-15738 Zeuthen, Germany

[6] Dipartimento Fis, Piazzale Aldo Moro 5, I-00185 Rome, Italy

[7] Ist Nazl Fis Nucl, Sez Roma La Sapienza, Piazzale Aldo Moro 5, I-00185 Rome, Italy

[8] Ist Nazl Fis Nucl, Sez Roma Tre, Via Vasca Navale 84, I-00146 Rome, Italy

[9] Univ Cyprus, Dept Phys, POB 20537, CY-1678 Nicosia, Cyprus

[10] Univ Wuppertal, Fac Math & Nat Sci, D-42119 Wuppertal, Germany

[11] Univ Roma Tor Vergata, Dipartimento Fis, Via Ric Sci 1, I-00133 Rome, Italy

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2022年 / 2022卷 / 10期

关键词：

Lattice QCD; Vacuum Structure and Confinement; Axions and ALPs; CP Violation; CP CONSERVATION; GLUEBALL MASSES; MONTE-CARLO; LATTICE; INSTANTONS; CHARGE;

D O I：

10.1007/JHEP10(2022)197

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We compute the topological susceptibility of N-f = 2 + 1 QCD with physical quark masses in the high-temperature phase, using numerical simulations of the theory discretized on a space-time lattice. More precisely we estimate the topological susceptibility for five temperatures in the range from similar to 200 MeV up to similar to 600 MeV, adopting the spectral projectors definition of the topological charge based on the staggered Dirac operator. This strategy turns out to be effective in reducing the large lattice artifacts which affect the standard gluonic definition, making it possible to perform a reliable continuum extrapolation. Our results for the susceptibility in the explored temperature range are found to be partially in tension with previous determinations in the literature.

引用

页数：33

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