Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Navarra, Fernando S."'
In this work we discuss how femtoscopic analysis can shed light on the nature of the two lightest axial charmed mesons, denominated as $D_1(2430)$ and $D_1(2420)$, whose masses are similar but widths are different. Their properties are reasonably des
Externí odkaz:
http://arxiv.org/abs/2410.18213
Publikováno v:
Phys. Rev. D 105, 116029 (2022)
We study the evolution of the doubly charmed state $T_{cc}^+$ in a hot hadron gas produced in the late stage of heavy-ion collisions. We use effective Lagrangians to calculate the thermally averaged cross sections of $T_{cc}^+$ production in reaction
Externí odkaz:
http://arxiv.org/abs/2202.10882
Autor:
Albuquerque, Raphael M., Dias, Jorgivan M., Khemchandani, K. P., Torres, A. Martinez, Navarra, Fernando S., Nielsen, Marina, Zanetti, Carina M.
In the past decade, due to the experimental observation of many charmonium-like states, there has been a revival of hadron spectroscopy. In particular, the experimental observation of charged charmonium-like, $Z_c$ states, and bottomonium-like, $Z_b$
Externí odkaz:
http://arxiv.org/abs/1812.08207
Autor:
Nielsen, Marina, Brodsky, Stanley J., de Téramond, Guy F., Dosch, Hans Günter, Navarra, Fernando S., Zou, Liping
Publikováno v:
Phys. Rev. D 98, 034002 (2018)
Relativistic light-front bound-state equations for double-heavy mesons, baryons and tetraquarks are constructed in the framework of supersymmetric light front holographic QCD. Although heavy quark masses strongly break conformal symmetry, supersymmet
Externí odkaz:
http://arxiv.org/abs/1805.11567
Autor:
Tolos, Laura, Cabrera, Daniel, Khemchandani, Kanchan, Martinez-Torres, Alberto, Bratkovskaya, Elena, Aichelin, Joerg, Nielsen, Marina, Navarra, Fernando S.
We study the properties of strange mesons in vacuum and in the hot nuclear medium within unitarized coupled-channel effective theories. We determine transition probabilities, cross sections and scattering lengths for strange mesons. These scattering
Externí odkaz:
http://arxiv.org/abs/1512.03639
Publikováno v:
Phys. Rev. D 91, 074008 (2015)
We investigate the factorization hypothesis of the four-quark condensate $\langle q \bar{q} q \bar{q} \rangle = \, A \, \langle q \bar{q} \rangle^2$ with the help of the Nambu Jona-Lasinio Model supplemented with eighth order interactions. For that p
Externí odkaz:
http://arxiv.org/abs/1404.4094
Autor:
Nielsen, Marina, Navarra, Fernando S.
In this short review we present and discuss all the experimental information about the charged exotic charmonium states, which have been observed over the last five years. We try to understand their properties such as masses and decay widths with QCD
Externí odkaz:
http://arxiv.org/abs/1401.2913
Publikováno v:
Nucl.Phys.Proc.Suppl.207-208:249-252,2010
Using the QCD spectral sum rule approach we investigate different currents with $J^{PC}=1^{++}$, which could be associated with the $X(3872)$ meson. Our results indicate that, with a four-quark or molecular structure, it is very difficult to explain
Externí odkaz:
http://arxiv.org/abs/1007.4575
Publikováno v:
Phys.Rept.497:41-83,2010
In the past years there has been a revival of hadron spectroscopy. Many interesting new hadron states were discovered experimentally, some of which do not fit easily into the quark model. This situation motivated a vigorous theoretical activity. This
Externí odkaz:
http://arxiv.org/abs/0911.1958
Publikováno v:
Phys.Lett.B661:28-32,2008
We use QCD sum rules to study the recently observed meson $Z^+(4430)$, considered as a $D^*D_1$ molecule with $J^{P}=0^{-}$. We consider the contributions of condensates up to dimension eight and work at leading order in $\alpha_s$. We get $m_Z=(4.40
Externí odkaz:
http://arxiv.org/abs/0710.1029