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pro vyhledávání: '"Castellà, Jaume Tarrús"'
One of the portals to new physics is a light scalar coupled to the Standard Model (SM) Higgs. In this paper we focus on hadronic decays of such a scalar in the regime where QCD dynamics is nonperturbative, resulting, e.g., in decays to pairs of pions
Externí odkaz:
http://arxiv.org/abs/2407.13587
Autor:
Castellà, Jaume Tarrús
Publikováno v:
JHEP 06 (2024) 107
We present the leading order coupling of double-heavy hadrons to heavy hadron pairs in Born-Oppenheimer effective field theory. We obtain the expressions for the contribution of heavy hadron pairs to the masses and widths of double-heavy hadrons. We
Externí odkaz:
http://arxiv.org/abs/2401.13393
Publikováno v:
Phys.Rev. D 107, 034020 (2023)
We compute the chromopolarizabilities of the fully heavy baryons $\Omega_{QQQ'}$ ($Q,Q'=b,c$) in the framework of potential nonrelativistic quantum chromodynamics. At leading order, the fully heavy hadrons are considered as ground chromo-Coulombic bo
Externí odkaz:
http://arxiv.org/abs/2211.14100
Autor:
Castellà, Jaume Tarrús
We report on a recent computation of the transitions of exotic bottomonium to standard bottomonium and light quark hadrons. We work under the assumption that the $\Upsilon(10753)$ and $\Upsilon(11020)$ can be described as the lowest laying and first
Externí odkaz:
http://arxiv.org/abs/2209.08548
Autor:
Castellà, Jaume Tarrús
We consider heavy meson-antimeson pairs and their coupling to quarkonium in the context of nonrelativistic EFTs incorporating the adiabatic expansion. We work out all the leading order couplings of quarkonium to heavy meson-antimeson pairs and obtain
Externí odkaz:
http://arxiv.org/abs/2207.09365
Autor:
Castellà, Jaume Tarrús
We report on the recent progress on the computation of the doubly heavy baryon spectrum in effective field theory. The effective field theory is built upon the heavy-quark mass and adiabatic expansions. The potentials can be expressed as NRQCD Wilson
Externí odkaz:
http://arxiv.org/abs/2111.09783
Autor:
Soto, Joan, Castellà, Jaume Tarrús
Publikováno v:
Phys. Rev. D 104, 074027 (2021)
Expressions for the potentials appearing in the nonrelativistic effective field theory description of doubly heavy baryons are known in terms of operator insertions in the Wilson loop. However, their evaluation requires nonperturbative techniques, su
Externí odkaz:
http://arxiv.org/abs/2108.00496
Autor:
Segovia, Jorge, Castellà, Jaume Tarrús
Publikováno v:
Phys. Rev. D 104, 074032 (2021)
We study the photon spectrum line-shape of the $J/\psi \to \gamma\eta_c\to \gamma X$ decay process in a nonrelativistic effective field theory (EFT) framework of quantum chromodynamics (QCD). We take into account the finite width of the $\eta_c$ and
Externí odkaz:
http://arxiv.org/abs/2106.15203
Publikováno v:
Phys. Rev. D 104, 034019 (2021)
We study the transition widths of $\Upsilon(10753)$ and $\Upsilon(11020)$ into standard bottomonium under the hypothesis that they correspond to the two lowest laying $1^{--}$ hybrid bottomonium states. We employ weakly coupled potential NRQCD an eff
Externí odkaz:
http://arxiv.org/abs/2104.03975
Autor:
Soto, Joan, Castellà, Jaume Tarrús
Publikováno v:
Phys. Rev. D 102, 014012 (2020)
We propose an effective field theory to describe hadrons with two heavy quarks without any assumption on the typical distance between the heavy quarks with respect to the typical hadronic scale. The construction is based on Non-Relativistic QCD and i
Externí odkaz:
http://arxiv.org/abs/2005.00552