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Author 
YamagataSekihara, J.; Roca, L.; Oset, E. 


Title 
Nature of the K2*(1430), K3*(1780), K4*(2045), K5*(2380), and K6* as K*multirho states 
Type 
Journal Article 

Year 
2010 
Publication 
Physical Review D 
Abbreviated Journal 
Phys. Rev. D 


Volume 
82 
Issue 
9 
Pages 
094017  8pp 


Keywords 



Abstract 
We show that the K2*(1430), K3*(1780), K4*(2045), K5*(2380), and a notyetdiscovered K6* resonance are basically molecules made of an increasing number of rho(770) and one K*(892) mesons. The idea relies on the fact that the vectorvector interaction in the s wave with spins aligned is very strong for both rho rho and K*rho. We extend a recent work, where several resonances showed up as multirho(770) molecules, to the strange sector including the K*(892) into the system. The resonant structures show up in the multibody scattering amplitudes, which are evaluated in terms of the unitary twobody vectorvector scattering amplitudes by using the fixed center approximation to the Faddeev equations. 


Address 
[YamagataSekihara, J.; Oset, E.] Univ Valencia, CSIC, Dept Fis Teor IFIC, Ctr Mixto,Inst Invest Paterna, Valencia 46071, Spain 


Corporate Author 

Thesis 



Publisher 
Amer Physical Soc 
Place of Publication 

Editor 



Language 
English 
Summary Language 

Original Title 



Series Editor 

Series Title 

Abbreviated Series Title 



Series Volume 

Series Issue 

Edition 



ISSN 
15507998 
ISBN 

Medium 



Area 

Expedition 

Conference 



Notes 
ISI:000284206500003 
Approved 
no 


Is ISI 
yes 
International Collaboration 
no 


Call Number 
IFIC @ elepoucu @ 
Serial 
323 

Permanent link to this record 




Author 
Roca, L.; Oset, E. 


Title 
Description of the f(2)(1270), rho(3)(1690), f(4)(2050), rho(5)(2350), f(6)(2510) resonances as multirho(770) states 
Type 
Journal Article 

Year 
2010 
Publication 
Physical Review D 
Abbreviated Journal 
Phys. Rev. D 


Volume 
82 
Issue 
5 
Pages 
054013  11pp 


Keywords 



Abstract 
In a previous work regarding the interaction of two rho(770) resonances, the f(2)(1270) (J(PC) = 2(++)) resonance was obtained dynamically as a tworho molecule with a very strong binding energy, 135 MeV per rho particle. In the present work we use the rho rho interaction in spin 2 and isospin 0 channel to show that the resonances rho(3)(1690) (3()), f(4)(2050) (4(++)), rho(5)(2350) (5()), and f(6)(2510) (6(++)) are basically molecules of increasing number of rho(770) particles. We use the fixed center approximation of the Faddeev equations to write the multibody interaction in terms of the twobody scattering amplitudes. We find the masses of the states very close to the experimental values and we get an increasing value of the binding energy per rho as the number of rho mesons is increased. 


Address 
[Roca, L.] Univ Murcia, Dept Fis, E30071 Murcia, Spain 


Corporate Author 

Thesis 



Publisher 
Amer Physical Soc 
Place of Publication 

Editor 



Language 
English 
Summary Language 

Original Title 



Series Editor 

Series Title 

Abbreviated Series Title 



Series Volume 

Series Issue 

Edition 



ISSN 
15507998 
ISBN 

Medium 



Area 

Expedition 

Conference 



Notes 
ISI:000281791100002 
Approved 
no 


Is ISI 
yes 
International Collaboration 
no 


Call Number 
IFIC @ elepoucu @ 
Serial 
381 

Permanent link to this record 




Author 
Roca, L.; Oset, E. 


Title 
Asymmetry observables in e(+)e() > pi(+) pi() gamma in the phi region within a chiral unitary approach 
Type 
Journal Article 

Year 
2010 
Publication 
Physical Review D 
Abbreviated Journal 
Phys. Rev. D 


Volume 
81 
Issue 
1 
Pages 
014010  8pp 


Keywords 



Abstract 
We make a theoretical study of the charge and forwardbackward pion asymmetries in the e(+)e() > pi(+) pi() gamma process on and off the phi resonance energy. These observables are rather sensitive to the inner details of the theoretical models to describe the reaction. In addition to the standard implementation of the initial state radiation and the bremsstrahlung contribution to the final state radiation, we use the techniques of the chiral unitary approach to evaluate the contribution from the mechanisms of phi decay into pi(+) pi() gamma. This contribution involves the implementation of final state interaction from direct chiral loops, the exchange of vector and axialvector resonances and the final state interaction through the consideration of the mesonmeson unitarized amplitudes, which were found important in a previous work describing the phi > pi pi gamma. We find a good reproduction of the experimental data from KLOE for the forwardbackward asymmetry, both at the phi peak and away from it. We also make predictions for the angular distributions of the charge asymmetry and show that this observable is very sensitive to the chiral loops involved in phi radiative decay. 


Address 
[Roca, L.] Univ Murcia, Dept Fis, E30071 Murcia, Spain 


Corporate Author 

Thesis 



Publisher 
Amer Physical Soc 
Place of Publication 

Editor 



Language 
English 
Summary Language 

Original Title 



Series Editor 

Series Title 

Abbreviated Series Title 



Series Volume 

Series Issue 

Edition 



ISSN 
15507998 
ISBN 

Medium 



Area 

Expedition 

Conference 



Notes 
ISI:000274002800021 
Approved 
no 


Is ISI 
yes 
International Collaboration 
no 


Call Number 
IFIC @ elepoucu @ 
Serial 
503 

Permanent link to this record 




Author 
Roca, L.; Oset, E. 


Title 
Scattering of unstable particles in a finite volume: The case of pi rho scattering and the a(1)(1260) resonance 
Type 
Journal Article 

Year 
2012 
Publication 
Physical Review D 
Abbreviated Journal 
Phys. Rev. D 


Volume 
85 
Issue 
5 
Pages 
054507  13pp 


Keywords 



Abstract 
We present a way to evaluate the scattering of unstable particles quantized in a finite volume with the aim of extracting physical observables for infinite volume from lattice data. We illustrate the method with the pi rho scattering which generates dynamically the axialvector a(1)(1260) resonance. Energy levels in a finite box are evaluated both considering the rho as a stable and unstable resonance and we find significant differences between both cases. We discuss how to solve the problem to get the physical scattering amplitudes in the infinite volume, and hence phase shifts, from possible lattice results on energy levels quantized inside a finite box. 


Address 
[Roca, L.] Univ Murcia, Dept Fis, E30071 Murcia, Spain 


Corporate Author 

Thesis 



Publisher 
Amer Physical Soc 
Place of Publication 

Editor 



Language 
English 
Summary Language 

Original Title 



Series Editor 

Series Title 

Abbreviated Series Title 



Series Volume 

Series Issue 

Edition 



ISSN 
15507998 
ISBN 

Medium 



Area 

Expedition 

Conference 



Notes 
WOS:000301706700004 
Approved 
no 


Is ISI 
yes 
International Collaboration 
no 


Call Number 
IFIC @ pastor @ 
Serial 
941 

Permanent link to this record 




Author 
Roca, L.; Oset, E. 


Title 
Lambda(1405) poles obtained from pi(0)Sigma(0) photoproduction data 
Type 
Journal Article 

Year 
2013 
Publication 
Physical Review C 
Abbreviated Journal 
Phys. Rev. C 


Volume 
87 
Issue 
5 
Pages 
055201  8pp 


Keywords 



Abstract 
We present a strategy to extract the position of the two Lambda(1405) poles from experimental photoproduction data measured recently at different energies in the gamma p > K+pi(0)Sigma(0) reaction at Jefferson Laboratory. By means of a chiral dynamics motivated potential with free parameters, we solve the BetheSalpeter equation in the coupled channels (K) over barN and pi Sigma in isospin I = 0 and parametrize the amplitude for the photonuclear reaction in terms of a linear combination of the pi Sigma > pi Sigma and (K) over barN > pi Sigma scattering amplitudes in I = 0, with a different linear combination for each energy. Good fits to the data are obtained with some sets of parameters, by means of which one can also predict the cross section for the K p > pi(0)Sigma(0) reaction. These later results help us decide among the possible solutions. The result is that the different solutions lead to two poles similar to those found in the chiral unitary approach. With the best result we find the two Lambda(1405) poles at 1385 – 68i MeV and 1419 – 22i MeV. 


Address 
Univ Murcia, Dept Fis, E30100 Murcia, Spain 


Corporate Author 

Thesis 



Publisher 
Amer Physical Soc 
Place of Publication 

Editor 



Language 
English 
Summary Language 

Original Title 



Series Editor 

Series Title 

Abbreviated Series Title 



Series Volume 

Series Issue 

Edition 



ISSN 
05562813 
ISBN 

Medium 



Area 

Expedition 

Conference 



Notes 
WOS:000318527400004 
Approved 
no 


Is ISI 
yes 
International Collaboration 
no 


Call Number 
IFIC @ pastor @ 
Serial 
1442 

Permanent link to this record 




Author 
Roca, L.; Oset, E. 


Title 
Isospin 0 and 1 resonances from pi Sigma photoproduction data 
Type 
Journal Article 

Year 
2013 
Publication 
Physical Review C 
Abbreviated Journal 
Phys. Rev. C 


Volume 
88 
Issue 
5 
Pages 
055206  7pp 


Keywords 



Abstract 
Recently we presented a successful strategy to extract the position of the two Lambda ( 1405) poles from experimental photoproduction data on the gamma p > K+pi(0)Sigma(0) reaction at Jefferson Lab. Following a similar strategy, we extend the previous method to incorporate also the isospin 1 component which allows us to consider in addition the experimental data on gamma p > K+pi(+/)Sigma(/+). The idea is based on considering a production mechanism as model independent as possible and implementing the final state interaction of the final mesonbaryon pair based on small modifications of the unitary chiral perturbation theory amplitudes. Good fits to the data are obtained with this procedure, by means of which we can also predict the cross sections for the K p > (K) over barN, pi Sigma, and pi Lambda reactions for the different charge channels. Besides the two poles found for the Lambda(1405) resonance, we discuss the possible existence of an isospin 1 resonance in the vicinity of the (K) over barN threshold. 


Address 
[Roca, L.] Univ Murcia, Dept Fis, E30100 Murcia, Spain 


Corporate Author 

Thesis 



Publisher 
Amer Physical Soc 
Place of Publication 

Editor 



Language 
English 
Summary Language 

Original Title 



Series Editor 

Series Title 

Abbreviated Series Title 



Series Volume 

Series Issue 

Edition 



ISSN 
05562813 
ISBN 

Medium 



Area 

Expedition 

Conference 



Notes 
WOS:000327315800008 
Approved 
no 


Is ISI 
yes 
International Collaboration 
no 


Call Number 
IFIC @ pastor @ 
Serial 
1655 

Permanent link to this record 




Author 
Aceti, F.; Oset, E.; Roca, L. 


Title 
Composite nature of the Lambda (1520) resonance 
Type 
Journal Article 

Year 
2014 
Publication 
Physical Review C 
Abbreviated Journal 
Phys. Rev. C 


Volume 
90 
Issue 
2 
Pages 
025208  8pp 


Keywords 



Abstract 
Recently, the Weinberg compositeness condition of a bound state was generalized to account for resonant states and higher partial waves. We apply this extension to the case of the Lambda (1520) resonance and quantify the weight of the mesonbaryon components in contrast to other possible genuine building blocks. This resonance was theoretically obtained from a coupled channels analysis using the swave pi Sigma* and K Xi* and the dwave (K) over bar N and pi Sigma channels, applying the techniques of the chiral unitary approach. We obtain the result that this resonance is essentially dynamically generated from these mesonbaryon channels, leaving room for only 15% weight of other kinds of components in its wave function. 


Address 
[Aceti, F.; Oset, E.] Univ Valencia, CSIC, Ctr Mixto, Inst Invest Paterna,Dept Fis Teor, E46071 Valencia, Spain 


Corporate Author 

Thesis 



Publisher 
Amer Physical Soc 
Place of Publication 

Editor 



Language 
English 
Summary Language 

Original Title 



Series Editor 

Series Title 

Abbreviated Series Title 



Series Volume 

Series Issue 

Edition 



ISSN 
05562813 
ISBN 

Medium 



Area 

Expedition 

Conference 



Notes 
WOS:000341271300006 
Approved 
no 


Is ISI 
yes 
International Collaboration 
no 


Call Number 
IFIC @ pastor @ 
Serial 
1907 

Permanent link to this record 




Author 
Roca, L.; Nieves, J.; Oset, E. 


Title 
LHCb pentaquark as a (D)overbar*Sigma(c) – (D)overbar*Sigma(c)* molecular state 
Type 
Journal Article 

Year 
2015 
Publication 
Physical Review D 
Abbreviated Journal 
Phys. Rev. D 


Volume 
92 
Issue 
9 
Pages 
094003  6pp 


Keywords 



Abstract 
We perform a theoretical analysis of the Lambda(b) > J/psi K()p reaction from where a recent LHCb experiment extracts a Lambda(1405) contribution in the K()p spectrum close to threshold and two baryon states of hidden charm in the J/psi p spectrum. We recall that baryon states of this type have been theoretically predicted matching the mass, width and J(P) of the experiment; concretely some states built up from the J/psi N, (D) over bar*Lambda(c), (D) over bar*Sigma(c), (D) over bar Sigma(c)* and (D) over bar*Sigma(c)* coupled channels. We assume that the observed narrow state around 4450 MeV has this nature and we are able to describe simultaneously the shapes and relative strength of the the K()p mass distribution close to threshold and the peak of the J/psi p distribution, with values of the J/psi p coupling to the resonance in line with the theoretical ones. The nontrivial matching of many properties gives support to a J(P) = 3/2() assignment to this state and to its nature as a molecular state mostly made of (D) over bar*Sigma(c) and (D) over bar*Sigma(c)*. 


Address 
[Roca, L.] Univ Murcia, Dept Fis, E30100 Murcia, Spain 


Corporate Author 

Thesis 



Publisher 
Amer Physical Soc 
Place of Publication 

Editor 



Language 
English 
Summary Language 

Original Title 



Series Editor 

Series Title 

Abbreviated Series Title 



Series Volume 

Series Issue 

Edition 



ISSN 
15507998 
ISBN 

Medium 



Area 

Expedition 

Conference 



Notes 
WOS:000364019700004 
Approved 
no 


Is ISI 
yes 
International Collaboration 
no 


Call Number 
IFIC @ pastor @ 
Serial 
2448 

Permanent link to this record 




Author 
Roca, L.; Oset, E. 


Title 
Role of a triangle singularity in the pi Delta decay of N(1700)(3/2()) 
Type 
Journal Article 

Year 
2017 
Publication 
Physical Review C 
Abbreviated Journal 
Phys. Rev. C 


Volume 
95 
Issue 
6 
Pages 
065211  8pp 


Keywords 



Abstract 
We show the important role played by the pi Delta(1232) channel in the build up of the N(1700)(3/2()) resonance due to the nontrivial enhancement produced by a singularity of a triangular loop. The N(1700) is one of the dynamically generated resonances produced by the coupledchannel vectorbaryon interaction. The pi Delta channel was neglected in previous works but we show that it has to be incorporated into the coupledchannel formalism due to an enhancement produced by a singularity in the triangular loop with., nucleon, and p as internal loop lines and pi and Delta as external ones. The enhancement is of nonresonant origin but it contributes to the dynamical generation of the N(1700) resonance due to the nonlinear dynamics involved in the coupledchannel mechanisms. We obtain an important increase of the total width of the N(1700) resonance when the pi Delta channel is included and provide predictions for the partial widths of the N(1700) decays into VB and pi Delta. 


Address 
[Roca, L.] Univ Murcia, Dept Fis, E30100 Murcia, Spain 


Corporate Author 

Thesis 



Publisher 
Amer Physical Soc 
Place of Publication 

Editor 



Language 
English 
Summary Language 

Original Title 



Series Editor 

Series Title 

Abbreviated Series Title 



Series Volume 

Series Issue 

Edition 



ISSN 
24699985 
ISBN 

Medium 



Area 

Expedition 

Conference 



Notes 
WOS:000404022100005 
Approved 
no 


Is ISI 
yes 
International Collaboration 
no 


Call Number 
IFIC @ pastor @ 
Serial 
3177 

Permanent link to this record 




Author 
Sakai, S.; Roca, L.; Oset, E. 


Title 
Charmbeauty meson bound states from B (B*)D(D*) and interaction B (B*)(D)overbar((D)overbar*) 
Type 
Journal Article 

Year 
2017 
Publication 
Physical Review D 
Abbreviated Journal 
Phys. Rev. D 


Volume 
96 
Issue 
5 
Pages 
054023  9pp 


Keywords 



Abstract 
We evaluate the swave interaction of pseudoscalar and vector mesons with both charm and beauty to investigate the possible existence of molecular BD, B* D, BD*, B* D*, B (D) over bar, B* (D) over bar, B (D) over bar*, or B* (D) over bar* meson states. The scattering amplitude is obtained implementing unitarity starting from a tree level potential accounting for the dominant vector meson exchange. The diagrams are evaluated using suitable extensions to the heavy flavor sector of the hidden gauge symmetry Lagrangians involving vector and pseudoscalar mesons, respecting heavy quark spin symmetry. We obtain bound states at energies above 7 GeV for BD (J(P) = 0(+)), B* D (1(+)), BD* (1(+)), and B* D* (0(+), 1(+,) 2(+)), all in isospin 0. For B (D) over bar (0(+)), B* (D) over bar (1(+)), B (D) over bar* (1(+)), and B* (D) over bar* (0(+), 1(+), 2(+)) we also find similar bound states in I = 0, but much less bound, which would correspond to exotic meson states with _ (b) over bar and (c) over bar quarks, and for the I = 1 we find a repulsive interaction. We also evaluate the scattering lengths in all cases, which can be tested in current investigations of lattice QCD. 


Address 
[Sakai, S.; Oset, E.] Univ Valencia, CSIC, Inst Invest Paterna, Dept Fis Teor,Ctr Mixto, Aptdo 22085, Valencia 46071, Spain 


Corporate Author 

Thesis 



Publisher 
Amer Physical Soc 
Place of Publication 

Editor 



Language 
English 
Summary Language 

Original Title 



Series Editor 

Series Title 

Abbreviated Series Title 



Series Volume 

Series Issue 

Edition 



ISSN 
24700010 
ISBN 

Medium 



Area 

Expedition 

Conference 



Notes 
WOS:000411579700002 
Approved 
no 


Is ISI 
yes 
International Collaboration 
no 


Call Number 
IFIC @ pastor @ 
Serial 
3318 

Permanent link to this record 