IFIC Literature Database -- Query Results

	IFIC Literature Database Home \| Show All \| Simple Search \| Advanced Search	Login Quick Search: Field: contains: ...
	31-40 of 52 records found matching your query:

Search & Display Options

Select All Deselect All

<< 1 2 3 4 5 6 >>

List View

Citations

Details

	Records
	Author	Rinaldi, M.; Scopetta, S.; Traini, M.; Vento, V.
	Title	Double Parton Distributions in Light-Front Constituent Quark Models			Type	Journal Article
	Year	2015	Publication	Few-Body Systems	Abbreviated Journal	Few-Body Syst.
	Volume	56	Issue	6-9	Pages	515-521
	Keywords
	Abstract	Double parton distribution functions (dPDF), accessible in high energy proton-proton and proton-nucleus collisions, encode information on how partons inside a proton are correlated among each other and could represent a tool to explore the 3D proton structure. In recent papers, double parton correlations have been studied in the valence quark region, by means of constituent quark models. This framework allows to understand clearly the dynamical origin of the correlations and to establish which, among the features of the results, are model independent. Recent relevant results, obtained in a relativistic light-front scheme, able to overcome some drawbacks of previous calculations, such as the poor support, will be presented. Peculiar transverse momentum correlations, generated by the correct treatment of the boosts, are obtained. The role of spin correlations will be also shown. In this covariant approach, the symmetries of the dPDFs are unambiguously reproduced. The study of the QCD evolution of the model results has been performed in the valence sector, showing that, in some cases, the effect of evolution does not cancel that of correlations.
	Address	[Rinaldi, Matteo; Scopetta, Sergio] Univ Perugia, Dipartimento Fis & Geol, I-06100 Perugia, Italy, Email: matteo.rinaldi@pg.infn.it
	Corporate Author				Thesis
	Publisher	Springer Wien	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0177-7963	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000360435800042			Approved	no
	Is ISI	yes	International Collaboration	yes
	Call Number	IFIC @ pastor @			Serial	2370
Permanent link to this record



	Author	Rinaldi, M.; Scopetta, S.; Traini, M.; Vento, V.
	Title	Double parton correlations and constituent quark models: a light front approach to the valence sector			Type	Journal Article
	Year	2014	Publication	Journal of High Energy Physics	Abbreviated Journal	J. High Energy Phys.
	Volume	12	Issue	12	Pages	028 - 23pp
	Keywords	Phenomenological Models; Parton Model
	Abstract	An explicit evaluation of the double parton distribution functions (dPDFs), within a relativistic Light-Front approach to constituent quark models, is presented. dPDFs encode information on the correlations between two partons inside a target and represent the non-perturbative QCD ingredient for the description of double parton scattering in proton-proton collisions, a crucial issue in the search of new Physics at the LHC. Valence dPDFs are evaluated at the low scale of the model and the perturbative scale of the experiments is reached by means of QCD evolution. The present results show that the strong correlation effects present at the scale of the model are still sizable, in the valence region, at the experimental scale. At the low values of x presently studied at the LHC the correlations become less relevant, although they are still important for the spin-dependent contributions to unpolarized proton scattering.
	Address	[Rinaldi, M.; Scopetta, S.] Univ Perugia, Dipartimento Fis & Geol, I-06100 Perugia, Italy, Email: matteo.rinaldi@pg.infn.it;
	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	1029-8479	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000346002800001			Approved	no
	Is ISI	yes	International Collaboration	yes
	Call Number	IFIC @ pastor @			Serial	2028
Permanent link to this record



	Author	Mantovani Sarti, V.; Vento, V.
	Title	The half-skyrmion phase in a chiral-quark model			Type	Journal Article
	Year	2014	Publication	Physics Letters B	Abbreviated Journal	Phys. Lett. B
	Volume	728	Issue		Pages	323-327
	Keywords
	Abstract	The Chiral Dilaton Model, where baryons arise as non-topological solitons built from the interaction of quarks and chiral mesons, shows in the high density low temperature regime a two phase scenario in the nuclear matter phase diagram. Dense soliton matter described by the Wigner-Seitz approximation generates a periodic potential in terms of the sigma and pion fields that leads to the formation of a band structure. The analysis up to three times nuclear matter density shows that soliton matter undergoes two separate phase transitions: a delocalization of the baryon number density leading to B = 1/2 structures, as in skyrmion matter, at moderate densities, and quark deconfinement at larger densities. This description fits well into the so-called quarkyonic phase where, before deconfinement, nuclear matter should undergo structural changes involving the restoration of fundamental symmetries of QCD.
	Address	[Sarti, Valentina Mantovani] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy
	Corporate Author				Thesis
	Publisher	Elsevier Science Bv	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0370-2693	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000330556000053			Approved	no
	Is ISI	yes	International Collaboration	yes
	Call Number	IFIC @ pastor @			Serial	1707
Permanent link to this record



	Author	Rinaldi, M.; Scopetta, S.; Vento, V.
	Title	Double parton correlations in constituent quark models			Type	Journal Article
	Year	2013	Publication	Physical Review D	Abbreviated Journal	Phys. Rev. D
	Volume	87	Issue	11	Pages	114021 - 9pp
	Keywords
	Abstract	Double parton correlations, having effects on the double parton scattering processes occurring in high-energy hadron-hadron collisions, for example at the LHC, are studied in the valence quark region by means of constituent quark models. In this framework, two particle correlations are present without any additional prescription, at variance with what happens, for example, in independent particle models, such as the MIT bag model in its simplest version. From the present analysis, conclusions similar to the ones obtained recently in a modified version of the bag model can be drawn: correlations in the longitudinal momenta of the active quarks are found to be sizable, while those in transverse momentum are much smaller. However, the framework used allows us to understand clearly the dynamical origin of the correlations. In particular, it is shown that the small size of the correlations in transverse momentum is a model-dependent result, which would not occur if models with sizable quark orbital angular momentum were used to describe the proton. Our analysis permits us, therefore, to clarify the dynamical origin of the double parton correlations and to establish which, among the features of the results, are model independent. The possibility of testing the studied effects experimentally is discussed.
	Address	[Rinaldi, M.; Scopetta, S.] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy, Email: matteo.rinaldi@pg.infn.it;
	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	1550-7998	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000321001100004			Approved	no
	Is ISI	yes	International Collaboration	yes
	Call Number	IFIC @ pastor @			Serial	1509
Permanent link to this record



	Author	Mantovani-Sarti, V.; Park, B.Y.; Vento, V.
	Title	The Soliton-Soliton Interaction in the Chiral Dilaton Model			Type	Journal Article
	Year	2013	Publication	International Journal of Modern Physics A	Abbreviated Journal	Int. J. Mod. Phys. A
	Volume	28	Issue	27	Pages	1350136 - 19pp
	Keywords	Nontopological solitons; chiral symmetry; scale invariance; dense matter
	Abstract	We study the interaction between two B = 1 states in the Chiral Dilaton Model where baryons are described as nontopological solitons arising from the interaction of chiral mesons and quarks. By using the hedgehog solution for B = 1 states we construct, via a product ansatz, three possible B = 2 configurations to analyse the role of the relative orientation of the hedgehog quills in the dynamics of the soliton-soliton interaction and investigate the behavior of these solutions in the range of long/intermediate distance. One of the solutions is quite binding due to the dynamics of the pi and sigma fields at intermediate distance and should be used for nuclear matter studies. Since the product ansatz break down as the two solitons get close, we explore the short range distance regime with a model that describes the interaction via a six-quark bag ansatz. We calculate the interaction energy as a function of the inter-soliton distance and show that for small separations the six quarks bag, assuming a hedgehog structure, provides a stable bound state that at large separations connects with a special configuration coming from the product ansatz.
	Address	[Mantovani-Sarti, Valentina] Univ Ferrara, Dept Phys, I-44100 Ferrara, Italy, Email: smantovani@fe.infn.it
	Corporate Author				Thesis
	Publisher	World Scientific Publ Co Pte Ltd	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0217-751x	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000326625700006			Approved	no
	Is ISI	yes	International Collaboration	yes
	Call Number	IFIC @ pastor @			Serial	1641
Permanent link to this record



	Author	Garcia Canal, C.A.; Tarutina, T.; Vento, V.
	Title	Nuclear and partonic dynamics in the EMC effect			Type	Journal Article
	Year	2013	Publication	European Physical Journal A	Abbreviated Journal	Eur. Phys. J. A
	Volume	49	Issue	8	Pages	105 - 5pp
	Keywords
	Abstract	It has been recently confirmed that the magnitude of the EMC effect measured in the electron deep inelastic scattering is linearly related to the short-range correlation scaling factor obtained from electron inclusive scattering. By using a x-rescaling approach we are able to understand the interplay between the quark-gluon and hadronic degrees of freedom in the discussion of the EMC effect.
	Address	[Garcia Canal, Carlos A.; Tarutina, Tatiana] Univ Nacl La Plata, Fac Ciencias Exactas, Dept Fis, Lab Fis Teor,IFLP,CONICET, RA-1900 La Plata, Argentina, Email: vicente.vento@un.es
	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	1434-6001	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000323900500011			Approved	no
	Is ISI	yes	International Collaboration	yes
	Call Number	IFIC @ pastor @			Serial	1568
Permanent link to this record



	Author	Epele, L.N.; Fanchiotti, H.; Garcia Canal, C.A.; Mitsou, V.A.; Vento, V.
	Title	Looking for magnetic monopoles at LHC with diphoton events			Type	Journal Article
	Year	2012	Publication	European Physical Journal Plus	Abbreviated Journal	Eur. Phys. J. Plus
	Volume	127	Issue	5	Pages	60 - 15pp
	Keywords
	Abstract	Magnetic monopoles have been a subject of interest since Dirac established the relation between the existence of monopoles and charge quantization. The intense experimental search carried thus far has not met with success. The Large Hadron Collider is reaching energies never achieved before allowing the search for exotic particles in the TeV mass range. In a continuing effort to discover these rare particles we propose here other ways to detect them. We study the observability of monopoles and monopolium, a monopole-antimonopole bound state, at the Large Hadron Collider in the gamma gamma channel for monopole masses in the range 500-1000 GeV. We conclude that LHC is an ideal machine to discover monopoles with masses below 1 TeV at present running energies and with 5 fb(-1) of integrated luminosity.
	Address	[Epele, Luis N.; Fanchiotti, Huner; Garcia Canal, Carlos A.] Univ Nacl La Plata, Fac Ciencias Exactas, IFLP, CONICET,Dept Fis,Lab Fis Teor, RA-1900 La Plata, Argentina, Email: epele@fisica.unlp.edu.ar;
	Corporate Author				Thesis
	Publisher	Springer Heidelberg	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	2190-5444	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000304697400001			Approved	no
	Is ISI	yes	International Collaboration	yes
	Call Number	IFIC @ pastor @			Serial	1051
Permanent link to this record



	Author	Vento, V.
	Title	Confinement, the gluon propagator and the interquark potential for heavy mesons			Type	Journal Article
	Year	2013	Publication	European Physical Journal A	Abbreviated Journal	Eur. Phys. J. A
	Volume	49	Issue	6	Pages	71 - 7pp
	Keywords
	Abstract	The interquark static potential for heavy mesons described by a massive one-gluon exchange interaction obtained from the propagator of the truncated Dyson-Schwinger equations does not reproduced the expected Cornell potential. I show that no formulation based on a finite propagator will lead to confinement of quenched QCD. I propose a mechanism based on a singular nonperturbative coupling constant which has the virtue of giving rise to a finite gluon propagator and (almost) linear confinement. The mechanism can be slightly modified to produce the screened potentials of unquenched QCD.
	Address	Univ Valencia, CSIC, IFIC, Dept Fis Teor, E-46100 Burjassot, Valencia, Spain, Email: vicente.vento@uv.es
	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	1434-6001	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000321431100006			Approved	no
	Is ISI	yes	International Collaboration	no
	Call Number	IFIC @ pastor @			Serial	1510
Permanent link to this record



	Author	Mantovani-Sarti, V.; Drago, A.; Vento, V.; Park, B.Y.
	Title	The Baryon Number Two System in the Chiral Soliton Model			Type	Journal Article
	Year	2013	Publication	Few-Body Systems	Abbreviated Journal	Few-Body Syst.
	Volume	54	Issue	1-4	Pages	513-516
	Keywords
	Abstract	We study the interaction between two B = 1 states in a chiral soliton model where baryons are described as non-topological solitons. By using the hedgehog solution for the B = 1 states we construct three possible B = 2 configurations to analyze the role of the relative orientation of the hedgehog quills in the dynamics. The strong dependence of the intersoliton interaction on these relative orientations reveals that studies of dense hadronic matter using this model should take into account their implications.
	Address	[Mantovani-Sarti, Valentina; Drago, Alessandro] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy, Email: smantovani@fe.infn.it;
	Corporate Author				Thesis
	Publisher	Springer Wien	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0177-7963	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000314063300099			Approved	no
	Is ISI	yes	International Collaboration	yes
	Call Number	IFIC @ pastor @			Serial	1325
Permanent link to this record



	Author	Gonzalez, P.; Mathieu, V.; Vento, V.
	Title	Heavy meson interquark potential			Type	Journal Article
	Year	2011	Publication	Physical Review D	Abbreviated Journal	Phys. Rev. D
	Volume	84	Issue	11	Pages	114008 - 7pp
	Keywords
	Abstract	The resolution of Dyson-Schwinger equations leads to the freezing of the QCD running coupling (effective charge) in the infrared, which is best understood as a dynamical generation of a gluon mass function, giving rise to a momentum dependence which is free from infrared divergences. We calculate the interquark static potential for heavy mesons by assuming that it is given by a massive One Gluon Exchange interaction and compare with phenomenologyical fits inspired by lattice QCD. We apply these potential forms to the description of quarkonia and conclude that, even though some aspects of the confinement mechanism are absent in the Dyson-Schwinger formalism, the spectrum can be reasonably reproduced. We discuss possible explanations for this outcome.
	Address	[Gonzalez, P.; Mathieu, V.; Vento, V.] Univ Valencia, CSIC, IFIC, Dept Fis Teor, E-46100 Burjassot, Valencia, Spain, Email: p.gonzalez@uv.es
	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	1550-7998	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000297769700003			Approved	no
	Is ISI	yes	International Collaboration	no
	Call Number	IFIC @ pastor @			Serial	834
Permanent link to this record

Select All Deselect All

<< 1 2 3 4 5 6 >>

List View

Citations

Details

All Found Records Selected Records:

Save Citations: Format:

Export Records: Format:

Home

CQL Search | Library Search | Show Record | Extract Citations

Help