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Author |
Albaladejo, M.; Moussallam, B. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Extended chiral Khuri-Treiman formalism for eta -> 3 pi and the role of the a(0)(980), f(0)(980) resonances |
Type |
Journal Article |
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Year |
2017 |
Publication |
European Physical Journal C |
Abbreviated Journal |
Eur. Phys. J. C |
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Volume |
77 |
Issue |
8 |
Pages |
508 - 23pp |
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Abstract |
Recent experiments on eta -> 3 pi decays have provided an extremely precise knowledge of the amplitudes across the Dalitz region which represent stringent constraints on theoretical descriptions. We reconsider an approach in which the low-energy chiral expansion is assumed to be optimally convergent in an unphysical region surrounding the Adler zero, and the amplitude in the physical region is uniquely deduced by an analyticity-based extrapolation using the Khuri-Treiman dispersive formalism. We present an extension of the usual formalism which implements the leading inelastic effects from the K (K) over bar channel in the final-state pi pi interaction as well as in the initial-state eta pi interaction. The constructed amplitude has an enlarged region of validity and accounts in a realistic way for the influence of the two light scalar resonances f(0)(980) and a(0)(980) in the dispersive integrals. It is shown that the effect of these resonances in the low-energy region of the eta -> 3 pi decay is not negligible, in particular for the 3 pi(0) mode, and improves the description of the energy variation across the Dalitz plot. Some remarks are made on the scale dependence and the value of the double quark mass ratio Q. |
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Address ![sorted by Address field, ascending order (up)](img/sort_asc.gif) |
[Albaladejo, M.] Univ Valencia, CSIC, Ctr Mixto, Inst Fis Corpuscular IFIC, Valencia, Spain, Email: moussall@ipno.in2p3.fr |
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Springer |
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1434-6044 |
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Notes |
WOS:000406687400002 |
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no |
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yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
3229 |
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Permanent link to this record |
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Author |
Albaladejo, M.; Gonzàlez-Solís, S.; Bibrzycki, L.; Fernández-Ramírez, C.; Hammoud, N.; Mathieu, V.; Mikhasenko, M.; Montaña, G.; Perry, R.J.; Pilloni, A.; Rodas, A.; Smith, W.A.; Szczepaniak, A.; Winney, D. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Khuri-Treiman analysis of J/Psi -> pi+ pi-pi0 |
Type |
Journal Article |
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Year |
2023 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
108 |
Issue |
1 |
Pages |
014035 - 11pp |
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Abstract |
We study the decay J=& psi; & RARR; & pi; thorn & pi;-& pi;0 within the framework of the Khuri-Treiman equations. We find that the BESIII experimental dipion mass distribution in the & rho;o770 thorn -region is well reproduced with a once-subtracted P-wave amplitude. Furthermore, we show that F-wave contributions to the amplitude improve the description of the data in the & pi;& pi; mass region around 1.5 GeV. We also present predictions for the J=& psi; & RARR; & pi;0 & gamma;* transition form factor. |
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Address ![sorted by Address field, ascending order (up)](img/sort_asc.gif) |
[Albaladejo, M.] Univ Valencia, Ctr Mixto CSIC, Inst Fis Corpuscular IFIC, E-46071 Valencia, Spain, Email: Miguel.Albaladejo@ific.uv.es; |
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Amer Physical Soc |
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2470-0010 |
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Notes |
WOS:001056564000001 |
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no |
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yes |
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yes |
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Call Number |
IFIC @ pastor @ |
Serial |
5713 |
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Author |
Albaladejo, M. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
T-cc(+) coupled channel analysis and predictions |
Type |
Journal Article |
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Year |
2022 |
Publication |
Physics Letters B |
Abbreviated Journal |
Phys. Lett. B |
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Volume |
829 |
Issue |
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Pages |
137052 - 13pp |
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Abstract |
A coupled channel analysis of the D*D-+(0) and D*D-0(+) system is performed to study the doubly charmed T-cc(+) state recently discovered by the LHCb collaboration. We use a simple model for the scattering amplitude and production mechanism that allows us to describe well the experimental spectrum, and obtain the T-cc(+) pole in the coupled channel T-matrix. We find that this bound state has a large molecular component. The isospin (I = 0 or I = 1) of the state cannot be inferred from the (DD0)-D-0 pi(+) spectrum alone, although there is some experimental evidence that points to the I = 0 interpretation. Therefore, we use the same formalism to predict other DD pi spectra. In the case the T-cc(+) has I = 1, we also predict the location of the other two members (T-cc(+) and T-cc(0)) of the triplet. Finally, using Heavy-Quark Spin Symmetry, we predict the location of possible heavier D*D* (I = 0 or I= 1) partners. |
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Address ![sorted by Address field, ascending order (up)](img/sort_asc.gif) |
[Albaladejo, M.] Univ Valencia, Inst Invest Paterna, Ctr Mixto CSIC, Inst Fis Corpuscular IFIC, Aptd 22085, E-46071 Valencia, Spain, Email: Miguel.Albaladejo@ific.uv.es |
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Elsevier |
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English |
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ISSN |
0370-2693 |
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Notes |
WOS:000821533700009 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
no |
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Call Number |
IFIC @ pastor @ |
Serial |
5288 |
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Permanent link to this record |
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Author |
Albaladejo, M.; Bibrzycki, L.; Dawid, S.M.; Fernandez-Ramirez, C.; Gonzalez-Solis, S.; Hiller Blin, A.N.; Jackura, A.W.; Mathieu, V.; Mikhasenko, M.; Make, V.I.; Passemar, E.; Pilloni, A.; Rodas, A.; Silva-Castro, J.A.; Smith, W.A.; Szczepaniak, A.P.; Winney, D. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Novel approaches in hadron spectroscopy |
Type |
Journal Article |
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Year |
2022 |
Publication |
Progress in Particle and Nuclear Physics |
Abbreviated Journal |
Prog. Part. Nucl. Phys. |
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Volume |
127 |
Issue |
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Pages |
103981 - 75pp |
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Keywords |
Hadron spectroscopy; Exotic hadrons; Three-body scattering; Resonance production |
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Abstract |
The last two decades have witnessed the discovery of a myriad of new and unexpected hadrons. The future holds more surprises for us, thanks to new-generation experiments. Understanding the signals and determining the properties of the states requires a parallel theoretical effort. To make full use of available and forthcoming data, a careful amplitude modeling is required, together with a sound treatment of the statistical uncertainties, and a systematic survey of the model dependencies. We review the contributions made by the Joint Physics Analysis Center to the field of hadron spectroscopy. |
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Address ![sorted by Address field, ascending order (up)](img/sort_asc.gif) |
[Albaladejo, Miguel; Blin, Astrid N. Hiller; Jackura, Andrew W.; Mokeev, Victor, I; Passemar, Emilie; Rodas, Arkaitz; Szczepaniak, Adam P.] Thomas Jefferson Natl Accelerator Facil, Theory Ctr & Phys Div, Newport News, VA 23606 USA, Email: alessandro.pilloni@unime.it |
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Elsevier |
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English |
Summary Language |
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ISSN |
0146-6410 |
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Notes |
WOS:000883770300003 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
5422 |
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Permanent link to this record |
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Author |
Albaladejo, M.; Fernandez-Soler, P.; Guo, F.K.; Nieves, J. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Two-pole structure of the D-0*(2400) |
Type |
Journal Article |
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Year |
2017 |
Publication |
Physics Letters B |
Abbreviated Journal |
Phys. Lett. B |
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Volume |
767 |
Issue |
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Pages |
465-469 |
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Abstract |
The so far only known charmed non-strange scalar meson is dubbed as D-0(*)(2400) in the Review of Particle Physics. We show, within the framework of unitarized chiral perturbation theory, that there are in fact two (I = 1/2, J(P) = 0(+)) poles in the region of the D-0(*)( 2400) in the coupled-channel D pi, D eta and D-s (K) over bar scattering amplitudes. With all the parameters previously fixed, we predict the energy levels for the coupled-channel system in a finite volume, and find that they agree remarkably well with recent lattice QCD calculations. This successful description of the lattice data is regarded as a strong evidence for the two-pole structure of the D-0(*)( 2400). With the physical quark masses, the poles are located at (2105(-8)(+6) – i102(-12)(+10)) MeV and (2451(-26)(+36) – i134(-8)(+7)) MeV, with the largest couplings to the D pi and D-s (K) over bar channels, respectively. Since the higher pole is close to the D-s (K) over bar threshold, we expect it to show up as a threshold enhancement in the D-s (K) over bar invariant mass distribution. This could be checked by high-statistic data in future experiments. We also show that the lower pole belongs to the same SU(3) multiplet as the D-s0(*)(2317) state. Predictions for partners in the bottom sector are also given. |
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Address ![sorted by Address field, ascending order (up)](img/sort_asc.gif) |
[Albaladejo, Miguel; Fernandez-Soler, Pedro; Nieves, Juan] Univ Valencia, Ctr Mixto CSIC, Inst Invest Paterna, Inst Fis Corpuscular IFIC, Aptd 22085, E-46071 Valencia, Spain, Email: albaladejo@um.es; |
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Publisher |
Elsevier Science Bv |
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English |
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Abbreviated Series Title |
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Series Issue |
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ISSN |
0370-2693 |
ISBN |
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Conference |
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Notes |
WOS:000397861700070 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
3025 |
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Permanent link to this record |
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Author |
Albaladejo, M.; Nieves, J.; Oset, E.; Sun, Z.F.; Liu, X. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Can X(5568) be described as a B-s pi, B(K)over-bar resonant state? |
Type |
Journal Article |
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Year |
2016 |
Publication |
Physics Letters B |
Abbreviated Journal |
Phys. Lett. B |
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Volume |
757 |
Issue |
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Pages |
515-519 |
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Keywords |
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Abstract |
The DO Collaboration has recently seen a resonant-like peak in the B-s pi invariant mass spectrum, claimed to be a new state called X(5568). Using a B-s pi-B (K) over bar coupled channel analysis, implementing unitarity, and with the interaction derived from Heavy Meson Chiral Perturbation Theory, we are able to reproduce the reported spectrum, with a pole that can be associated to the claimed X(5568) state, and with mass and width in agreement with the ones reported in the experimental analysis. However, if the T-matrix regularization is performed by means of a momentum cutoff, the value for the latter needed to reproduce the spectrum is Lambda = 2.80 +/- 0.04 GeV, which is much larger than a “natural” value Lambda similar or equal to 1 GeV. In view of this, it is difficult to interpret the nature of this new state. This state would not qualify as a resonance dynamically generated by the unitarity loops. Assuming the observed peak to correspond to a physical state, we make predictions for partners in the D, D*, and B* sectors. Their observation (or lack thereof) would shed light into this issue. |
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Address ![sorted by Address field, ascending order (up)](img/sort_asc.gif) |
[Albaladejo, Miguel; Nieves, Juan; Oset, Eulogio; Sun, Zhi-Feng] Univ Valencia, CSIC, Inst Invest Paterna, Inst Fis Corpuscular IFIC,Ctr Mixto, Aptd 22085, E-46071 Valencia, Spain, Email: Miguel.Albaladejo@ific.uv.es |
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Elsevier Science Bv |
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English |
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0370-2693 |
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Notes |
WOS:000376800300072 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
2698 |
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Permanent link to this record |
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Author |
Albaladejo, M.; Guo, F.K.; Hanhart, C.; Meissner, U.G.; Nieves, J.; Nogga, A.; Yang, Z. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Note on X(3872) production at hadron colliders and its molecular structure |
Type |
Journal Article |
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Year |
2017 |
Publication |
Chinese Physics C |
Abbreviated Journal |
Chin. Phys. C |
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Volume |
41 |
Issue |
12 |
Pages |
121001 - 3pp |
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Keywords |
X(3872); hadronic molecules; exotic hadrons |
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Abstract |
The production of the X (3872) as a hadronic molecule in hadron colliders is clarified. We show that the conclusion of Bignamini et al., Phys. Rev. Lett. 103 (2009) 162001, that the production of the X(3872) at high pT implies a non-molecular structure, does not hold. In particular, using the well understood properties of the deuteron wave function as an example, we identify the relevant scales in the production process. |
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Address ![sorted by Address field, ascending order (up)](img/sort_asc.gif) |
[Albaladejo, Miguel] Univ Murcia, Dept Fis, E-30071 Murcia, Spain |
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Chinese Physical Soc |
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English |
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Series Issue |
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Edition |
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ISSN |
1674-1137 |
ISBN |
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Area |
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Expedition |
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Conference |
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Notes |
WOS:000417112000001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
3397 |
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Permanent link to this record |
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Author |
Albaladejo, M.; Fernandez-Soler, P.; Nieves, J.; Ortega, P.G. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Contribution of constituent quark model c(s)over-bar states to the dynamics of the D*s0 (2317) and Ds1(2460) resonances |
Type |
Journal Article |
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Year |
2018 |
Publication |
European Physical Journal C |
Abbreviated Journal |
Eur. Phys. J. C |
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Volume |
78 |
Issue |
9 |
Pages |
722 - 22pp |
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Keywords |
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Abstract |
The masses of the D*(s0) (2317) and D-s1(2460) resonances lie below the DK and D* K thresholds respectively, which contradicts the predictions of naive quark models and points out to non-negligible effects of the D(*) K loops in the dynamics of the even-parity scalar (J(pi) = 0(+)) and axial-vector (J(pi) = 1(+)) c (s) over bar systems. Recent lattice QCD studies, incorporating the effects of the D(*) K channels, analyzed these spin-parity sectors and correctly described the D*(s0)(2317) – D-s1(2460) mass splitting. Motivated by such works, we study the structure of the D*(s0)(2317) and D-s1(2460) resonances in the framework of an effective field theory consistent with heavy quark spin symmetry, and that incorporates the interplay between D(*) K meson-meson degrees of freedom and bare P-wave c (s) over bar states predicted by constituent quark models. We extend the scheme to finite volumes and fit the strength of the coupling between both types of degrees of freedom to the available lattice levels, which we successfully describe. We finally estimate the size of the D(*) K two-meson components in the D*(s0)(2317) and D-s1(2460) resonances, and we conclude that these states have a predominantly hadronic-molecular structure, and that it should not be tried to accommodate these mesons within c (s) over bar constituent quark model patterns. |
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Address ![sorted by Address field, ascending order (up)](img/sort_asc.gif) |
[Albaladejo, Miguel] Univ Murcia, Dept Fis, E-30071 Murcia, Spain, Email: albaladejo@um.es; |
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Publisher |
Springer |
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English |
Summary Language |
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ISSN |
1434-6044 |
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Notes |
WOS:000443822000003 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
no |
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Call Number |
IFIC @ pastor @ |
Serial |
3714 |
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Permanent link to this record |
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Author |
Albandea, D.; Del Debbio, L.; Hernandez, P.; Kenway, R.; Marsh Rossney, J.; Ramos, A. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Learning trivializing flows |
Type |
Journal Article |
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Year |
2023 |
Publication |
European Physical Journal C |
Abbreviated Journal |
Eur. Phys. J. C |
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Volume |
83 |
Issue |
7 |
Pages |
676 - 14pp |
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Keywords |
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Abstract |
The recent introduction of machine learning techniques, especially normalizing flows, for the sampling of lattice gauge theories has shed some hope on improving the sampling efficiency of the traditional hybrid Monte Carlo (HMC) algorithm. In this work we study a modified HMC algorithm that draws on the seminal work on trivializing flows by L & uuml;scher. Autocorrelations are reduced by sampling from a simpler action that is related to the original action by an invertible mapping realised through Normalizing Flows models with a minimal set of training parameters. We test the algorithm in a f(4) theory in 2D where we observe reduced autocorrelation times compared with HMC, and demonstrate that the training can be done at small unphysical volumes and used in physical conditions. We also study the scaling of the algorithm towards the continuum limit under various assumptions on the network architecture. |
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Address ![sorted by Address field, ascending order (up)](img/sort_asc.gif) |
[Albandea, D.; Hernandez, P.; Ramos, A.] Edificio Inst Invest, IFIC CSIC UVEG, Apt 22085, Valencia 46071, Spain, Email: david.albandea@uv.es |
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Springer |
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English |
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ISSN |
1434-6044 |
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Notes |
WOS:001066712500003 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
5698 |
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Permanent link to this record |
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Author |
Albandea, D.; Hernandez, P.; Ramos, A.; Romero-Lopez, F. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Topological sampling through windings |
Type |
Journal Article |
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Year |
2021 |
Publication |
European Physical Journal C |
Abbreviated Journal |
Eur. Phys. J. C |
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Volume |
81 |
Issue |
10 |
Pages |
873 - 12pp |
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Keywords |
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Abstract |
We propose a modification of the Hybrid Monte Carlo (HMC) algorithm that overcomes the topological freezing of a two-dimensional U(1) gauge theory with and without fermion content. This algorithm includes reversible jumps between topological sectors – winding steps – combined with standard HMC steps. The full algorithm is referred to as winding HMC (wHMC), and it shows an improved behaviour of the autocorrelation time towards the continuum limit. We find excellent agreement between the wHMC estimates of the plaquette and topological susceptibility and the analytical predictions in the U(1) pure gauge theory, which are known even at finite beta. We also study the expectation values in fixed topological sectors using both HMC and wHMC, with and without fermions. Even when topology is frozen in HMC – leading to significant deviations in topological as well as non-topological quantities – the two algorithms agree on the fixed-topology averages. Finally, we briefly compare the wHMC algorithm results to those obtained with master-field simulations of size L similar to 8 x 10(3). |
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Address ![sorted by Address field, ascending order (up)](img/sort_asc.gif) |
[Albandea, David; Hernandez, Pilar; Ramos, Alberto; Romero-Lopez, Fernando] UVEG, CSIC, IFIC, Edificio Inst Invest,Apt 22085, Valencia 46071, Spain, Email: David.Albandea@uv.es; |
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Springer |
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English |
Summary Language |
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1434-6044 |
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Conference |
|
|
|
Notes |
WOS:000703880600001 |
Approved |
no |
|
|
Is ISI |
yes |
International Collaboration |
no |
|
|
Call Number |
IFIC @ pastor @ |
Serial |
4979 |
|
Permanent link to this record |