343 research outputs found
Data Publication for "Pseudo-scalar meson spectral properties in the chiral crossover region of QCD"
No full textBala D, Kaczmarek O, Lowdon P, Philipsen O, Ueding T. Data Publication for "Pseudo-scalar meson spectral properties in the chiral crossover region of QCD". Bielefeld University; 2024.Data Publication for "Pseudo-scalar meson spectral properties in the chiral crossover region of QCD"
[arxiv:2310.13476[hep-lat]](https://arxiv.org/abs/2310.13476) / Datenpublikation publish gestellt (KW, 24.05.2024
Texas State Journal of Medicine, Volume 51x
No full textIndex for articles published in a monthly journal related to medicine and surgery in the state of Texas, including listings by subject and author with a list of officers for the State Medical Association of Texas
Texas State Journal of Medicine, Volume 60x
No full textIndex for articles published in a monthly journal related to medicine and surgery in the state of Texas, including listings by subject and author with a list of officers for the State Medical Association of Texas
Texas Medicine
No full textIndex for articles published in a monthly journal related to medicine and surgery in the state of Texas, including listings by subject and author with a list of officers for the Texas Medical Association
Texas Medicine
No full textIndex for articles published in a monthly journal related to medicine and surgery in the state of Texas, including listings by subject and author with a list of officers for the Texas Medical Association
Pseudo-scalar meson spectral properties in the chiral crossover region of QCD
No full textBala D, Kaczmarek O, Lowdon P, Philipsen O, Ueding T. Pseudo-scalar meson spectral properties in the chiral crossover region of QCD. Journal of High Energy Physics. 2024;(5): 332.Determining the type of excitations that can exist in a thermal medium is key to understanding how hadronic matter behaves at extreme temperatures. In this work we study this question for pseudo-scalar mesons comprised of light-strange and strange-strange quarks, analysing how their low-energy spectral properties are modified as one passes through the high-temperature chiral crossover region between T = 145.6 MeV and 172.3 MeV. We utilise the non-perturbative constraints satisfied by correlation functions at finite temperature in order to extract the low-energy meson spectral function contributions from spatial correlator lattice data in N f = 2 + 1 flavour QCD. The robustness of these contributions are tested by comparing their predictions with data for the corresponding temporal correlator at different momentum values. We find that around the pseudo-critical temperature T pc the data in both the light-strange and strange-strange channels is consistent with the presence of a distinct stable particle-like ground state component, a so-called thermoparticle excitation. As the temperature increases this excitation undergoes collisional broadening, and this is qualitatively the same in both channels. These findings suggest that pseudo-scalar mesons in QCD have a bound-state-like structure at low energies within the chiral crossover region which is still strongly influenced by the vacuum states of the theory
Texas State Journal of Medicine, Volume 28x
No full textIndex for articles published in a monthly journal related to medicine and surgery in the state of Texas, including listings by subject and author with a list of officers for the State Medical Association of Texas
Heart rate and blood pressure interactions during attempts to consciously raise or lower heart rate and blood pressure in normotensive subjects
No full textThis study investigated the interaction between heart rate (HR) and blood pressure (BP) during conscious control under visual biofeedback and background noise conditions. Normotensive volunteers were instructed to (i) decrease and (ii) increase HR (group A, n = 16) or BP (group B, n = 16). After instructions to lower HR or BP there was no significant change in HR or BP for either group. After instructions to raise HR, HR increased significantly (13.8 +/- 1.3 beats min(-1), P < 0.0001) and BP did not change. However, following instructions to raise BP, both HR and BP increased significantly: systolic BP (5.2 +/- 1.5 mmHg, P < 0.001), diastolic BP (3.5 +/- 0.9 mmHg, P < 0.001) and HR (8.6 +/- 1.3 beats min(-1), P < 0.0001). Biofeedback and background noise did not alter the relative change in HR or BP. In conclusion, normotensive subjects were unable to reduce BP or HR under conscious control. Subjects were able to increase both HR and BP, and voluntary increases in HR did not alter BP, while voluntary increases in BP also increased HR indicating distinct HR/BP interactions during conscious control
Non-perturbative constraints on the quark and ghost propagators
No full textIn QCD both the quark and ghost propagators are important for governing the non-perturbative dynamics of the theory. It turns out that the dynamical properties of the quark and ghost fields impose non-perturbative constraints on the analytic structure of these propagators. In this work we explicitly derive these constraints. In doing so we establish that the corresponding spectral densities include components which are multiples of discrete mass terms, and that the propagators are permitted to contain singular contributions involving derivatives of δ(p), both of which are particularly relevant in the context of confinement
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