PaperPanorama
FAQ

Nuclear Theory·nucl-th

Thursday·June 1, 2023

8 papers—4 primary·4 cross-listed

All8Primary4Cross-lists4
  1. 05

    Renormalons in the energy-energy correlator

    Stella T. Schindler🇺🇸 · Iain W. Stewart🇺🇸 · Zhiquan Sun🇺🇸

    The energy-energy correlator (EEC) is an observable of wide interest for collider physics and Standard Model measurements, due to both its simple theoretical description in terms of the energy-momentum tensor and its novel features for experimental studies. Significant progress has been made in both applications and higher-order perturbative predictions for the EEC. Here, we analyze the nature of the asymptotic perturbative series for the EEC by determining its analytic form in Borel space under the bubble-sum approximation. This result provides information on the leading and subleading nonperturbative power corrections through renormalon poles. We improve the perturbative convergence of the series for the EEC by removing its leading renormalon using an R scheme, which is independent of the bubble-sum approximation. Using the leading R-scheme power correction determined by fits to thrust, we find good agreement with EEC OPAL data already at .

    ↳ hep-phhep-thnucl-thJHEP(2023)·60 citations
  2. 06

    A closer look at the Yukawa's interaction from a symmetry group perspective

    Luiz L. Lopes🇧🇷

    I investigate the use of the SU(3) Clebsch-Gordan coefficients in light of the relations of completeness and closure. I show that in the case of 1, there is an additional interaction: the exchange of a meson between a and a hyperon that only affects the symmetric coupling. I then calculate these additional coupling constants and show that this recovers the completeness and closure of the SU(3) Clebsch-Gordan coefficients for all values of . Besides, it increases the symmetry of the theory, once now we can group the baryon octet into four doublets. Finally, I add the new coupling constants to study numerical results in the hyperon onset in dense nuclear matter assuming as a free parameter.

    ↳ hep-phnucl-thPTEP(2023)·6 citations
  3. 07

    Optimizing rodeo projection

    Thomas D. Cohen🇺🇸 · Hyunwoo Oh🇺🇸

    The rodeo algorithm has been proposed recently as an efficient method in quantum computing for projection of a given initial state onto a state of fixed energy for systems with discrete spectra. In the initial formulation of the rodeo algorithm these times were chosen randomly via a Gaussian distribution with fixed RMS times. In this paper it is shown that such a random approach for choosing times suffers from exponentially large fluctuations in the suppression of unwanted components: as the number of iterations gets large, the distribution of suppression factors obtained from random selection approaches a log-normal distribution leading to remarkably large fluctuations. We note that by choosing times intentionally rather than randomly such fluctuations can be avoided and strict upper bounds on the suppression can be obtained. Moreover, the average suppression using fixed computational cost can be reduced by many orders of magnitude relative to the random algorithm. A key to doing this is to choose times that vary over exponentially many times scales, starting from a modest maximum scale and going down to time scales exponentially smaller.

    ↳ quant-phhep-latnucl-thPRA(2023)·16 citations
  4. 08

    Jet quenching in mini-quark-gluon plasma: Medium modification factor for photon-tagged jets

    B.G. Zakharov🇷🇺

    We calculate the medium modification factor for the photon-tagged jet fragmentation functions for scenario with the quark-gluon plasma formation in and collisions. We perform calculations of radiative and collisional parton energy loss in the quark-gluon plasma with running which has a plateau around with fitted to the LHC data on the heavy ion . We find that the theoretical prediction for in TeV +Pb collisions are within errors consistent with the data from ALICE [1]. However, a definite conclusion about the presence or absence of jet quenching in collisions cannot be drawn due to large experimental errors of the ALICE data [1]. Our calculations show that this requires a significantly more accurate measurement of .

    ↳ hep-phnucl-thJETP Lett.(2023)·1 citation

Affiliations

first authorsco-authorsvia INSPIRE