| |
Record |
Links |
|
Author  |
Baeza-Ballesteros, J.; HernAndez, P.; Romero-Lopez, F. |
|
| |
Title |
The ππ scattering amplitude at large Nc |
Type |
Journal Article |
| |
Year |
2025 |
Publication |
Journal of High Energy Physics |
Abbreviated Journal |
J. High Energy Phys. |
|
| |
Volume |
08 |
Issue |
8 |
Pages |
110 - 65pp |
|
| |
Keywords |
1/N Expansion; Hadronic Spectroscopy; Structure and Interactions; Lattice QCD; Chiral Lagrangian |
|
| |
Abstract |
We study the scaling of meson-meson scattering amplitudes with the number of colors, N-c. We use lattice calculations in a theory with N-f= 4 degenerate flavors, with N-c= 3-6a nd pion mass M-pi approximate to 560 MeV. We focus on three different scattering channels, two of which have the same quantum numbers as some tetraquark candidates recently found at LHCb: the T-cs0(0)(2900),T-c s0(++)(2900),T-c s0(0)(2900) and T-cs1(0)(2900)states. Finite-volume energies are extracted using a large set of operators, containing two-particle operators with the form of two pions or two vector mesons, and local tetraquark operators. The resulting energy spectra is used to constrain the infinite-volume scattering amplitude by means of Luscher'squantization condition. We consider polynomial parametrizations of the phase shift, as well as one-loop chiral perturbation theory (ChPT) predictions. We find that our lattice results follow the expected N-c scaling and are sensitive to sub leading Nc corrections. In addition, we constrain the scaling of different combinations of low-energy constants from matching to large N-c ChPT. The results for the channel corresponding to a(pi D-+(s)+-K+D+)state show evide Nce of a virtual bound state with energy Evirtual= 1.63(10)M pi for N-c= 3, while this pole disappears atN(c)>3. This may be connected to the exotic states found in experiment |
|
| |
Address |
[Baeza-Ballesteros, Jorge] Deutsch Elektronen Synchroton DESY, Platanenallee 6, D-15738 Zeuthen, Germany, Email: jorge.baeza.ballesteros@desy.de; |
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
Springer |
Place of Publication |
|
Editor |
|
|
| |
Language |
English |
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
WOS:001553833800002 |
Approved |
no |
|
| |
Is ISI |
yes |
International Collaboration |
yes |
|
| |
Call Number |
IFIC @ pastor @ |
Serial |
6815 |
|
| Permanent link to this record |
