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f0(980)-meson as a K(K)over-bar molecule in a phenomenological Lagrangian approach

EUROPEAN PHYSICAL JOURNAL A (2008)

Journal

EUROPEAN PHYSICAL JOURNAL A

Volume 37, Issue 3, Pages 303-317

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SPRINGER

DOI: 10.1140/epja/i2008-10635-1

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Physics, Nuclear Physics, Particles & Fields

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Abstract

We discuss a possible interpretation of the f(0)(980)-meson as a hadronic molecule-a bound state of K and (K) over bar mesons. Using a phenomenological Lagrangian approach we calculate the strong f(0)( 980) -> pi pi and electromagnetic f(0)(980) -> gamma gamma decays. The compositeness condition provides a self-consistent method to determine the coupling constant between f(0) and its constituents, K and (K) over bar. Form factors governing the decays of the f(0)(980) are calculated by evaluating the kaon loop integrals. The predicted f(0)(980) -> pi pi and f(0)(980) -> gamma gamma decay widths are in good agreement with available data and results of other theoretical approaches.

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Senghi Soares, A. Sergi, N. Serra, L. Sestini, A. Seuthe, Y. Shang, D. M. Shangase, M. Shapkin, I. Shchemerov, L. Shchutska, T. Shears, L. Shekhtman, Z. Shen, S. Sheng, V. Shevchenko, B. Shi, E. B. Shields, Y. Shimizu, E. Shmanin, R. Shorkin, J. D. Shupperd, B. G. Siddi, R. Silva Coutinho, G. Simi, S. Simone, M. Singla, N. Skidmore, R. Skuza, T. Skwarnicki, M. W. Slater, J. C. Smallwood, J. G. Smeaton, E. Smith, K. Smith, M. Smith, A. Snoch, L. Soares Lavra, M. D. Sokoloff, F. J. P. Soler, A. Solomin, A. Solovev, I. Solovyev, R. Song, F. L. Souza De Almeida, B. Souza De Paula, B. Spaan, E. Spadaro Norella, E. Spedicato, E. Spiridenkov, P. Spradlin, V. Sriskaran, F. Stagni, M. Stahl, S. Stahl, S. Stanislaus, E. N. Stein, O. Steinkamp, O. Stenyakin, H. Stevens, S. Stone, D. Strekalina, Y. S. Su, F. Suljik, J. Sun, L. Sun, Y. Sun, P. Svihra, P. N. Swallow, K. Swientek, A. Szabelski, T. Szumlak, M. Szymanski, Y. Tan, S. Taneja, M. D. Tat, A. Terentev, F. Teubert, E. Thomas, D. J. D. Thompson, K. A. Thomson, H. Tilquin, V. Tisserand, S. T'Jampens, M. Tobin, L. Tomassetti, G. Tonani, X. Tong, D. Torres Machado, D. Y. Tou, S. M. Trilov, C. Trippl, G. Tuci, A. Tully, N. Tuning, A. Ukleja, D. J. Unverzagt, A. Usachov, A. Ustyuzhanin, U. Uwer, A. Vagner, V. Vagnoni, A. Valassi, G. Valenti, N. Valls Canudas, M. van Beuzekom, M. Van Dijk, H. Van Hecke, E. van Herwijnen, C. B. Van Hulse, M. van Veghel, R. Vazquez Gomez, P. Vazquez Regueiro, C. Vazquez Sierra, S. Vecchi, J. J. Velthuis, M. Veltri, A. Venkateswaran, M. Veronesi, M. Vesterinen, D. Vieira, M. Vieites Diaz, X. Vilasis-Cardona, E. Vilella Figueras, A. Villa, P. Vincent, F. C. Volle, D. vom Bruch, A. Vorobyev, V. Vorobyev, N. Voropaev, K. Vos, C. Vrahas, R. Waldi, J. Walsh, G. Wan, C. Wang, G. Wang, J. Wang, J. Wang, J. Wang, J. Wang, M. Wang, R. Wang, X. Wang, Y. Wang, Z. Wang, Z. Wang, Z. Wang, J. A. Ward, N. K. Watson, D. Websdale, Y. Wei, C. Weisser, B. D. C. Westhenry, D. J. White, M. Whitehead, A. R. Wiederhold, D. Wiedner, G. Wilkinson, M. K. Wilkinson, I. Williams, M. Williams, M. R. J. Williams, R. Williams, F. F. Wilson, W. Wislicki, M. Witek, L. Witola, C. P. Wong, G. Wormser, S. A. Wotton, H. Wu, J. Wu, K. Wyllie, Z. Xiang, D. Xiao, Y. Xie, A. Xu, J. Xu, L. Xu, M. Xu, Q. Xu, Z. Xu, Z. Xu, D. Yang, S. Yang, X. Yang, Y. Yang, Z. Yang, Z. Yang, L. E. Yeomans, V. Yeroshenko, H. Yeung, H. Yin, J. Yu, X. Yuan, E. Zaffaroni, M. Zavertyaev, M. Zdybal, O. Zenaiev, M. Zeng, C. Zhang, D. Zhang, L. Zhang, S. Zhang, S. Zhang, Y. Zhang, Y. Zhang, A. Zharkova, A. Zhelezov, Y. Zheng, T. Zhou, X. Zhou, Y. Zhou, V. Zhovkovska, X. Zhu, X. Zhu, Z. Zhu, V. Zhukov, Q. Zou, S. Zucchelli, D. Zuliani, G. Zunica

Summary: The LHCb experiment searched for the rare hadronic decay Bs(0) -> p(p) over bar using proton-proton collision data, and found evidence for the B-0 -> p (p) over bar decay mode. The branching fraction for this decay was determined, and an upper limit was set for the Bs(0) -> p (p) over bar decay.

PHYSICAL REVIEW D (2023)

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Article Astronomy & Astrophysics

Can the newly reported Pcs(4459) be a strange hidden-charm Ξc(D)over-bar* molecular pentaquark?

Rui Chen

Summary: The research results show that the new Pcs o4459THORN may not be a pure.cD molecular state, but a bound state with a coupled structure of Xi(')c <(Dover bar>* =.0 c D =. c D, indicating possible strange hidden-charm molecular or resonant structures near certain thresholds.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Coupled-channel effects of the Σc()(D)over-bar() - Λc(2595)(D)over-bar over line system and molecular nature of the Pc pentaquark states from one-boson exchange model

Nijiati Yalikun, Yong-Hui Lin, Feng-Kun Guo, Yuki Kamiya, Bing-Song Zou

Summary: The study suggests that by reducing the strength of the OPE delta(r) term in the OBE model by about 80%, it is possible to simultaneously reproduce the masses of Pc(4312), Pc(4440), and Pc(4457), leading to a better fit for the mass splittings.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Quasi-two-body B(s) → Vππ decays with resonance f0 (980) in the PQCD approach

Lei Yang, Zhi-Tian Zou, Ying Li, Xin Liu, Cui-Hua Li

Summary: Motivated by previous measurements, this study investigates charmless B decays to V(f(0)(980) ->)pi(+)pi(-) using perturbative QCD. Calculated branching fractions are in agreement with experimental data for specific mixing angles, and predictions for other decays can be tested in current experiments, providing valuable insight into isospin symmetry and direct CP asymmetries.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Kinematical higher-twist corrections in γ*γ → M(M)over-bar

Cedric Lorce, Bernard Pire, Qin-Tao Song

Summary: We estimated the kinematical higher-twist corrections to the gamma*(q(1))gamma(q(2)) -> M(p(1))(M) over bar (p(2)) amplitudes, and calculated the cross sections for gamma*gamma -> pi(0)pi(0) and gamma*gamma -> eta eta. The results show that the kinematical higher-twist corrections play an important role in the total cross section, and considering these corrections is necessary for an accurate evaluation of the meson energy-momentum tensor form factors.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Evidence supporting the existence of Pc(4380)± from the recent measurements of Bs → J=ψp(p)over-bar

Jun-Zhang Wang, Xiang Liu, Takayuki Matsuki

Summary: Recent measurements by the LHCb collaboration reveal a potential contribution from the Pc(4380)+ state in the process of Bs -> J=psi pp over bar, providing possible evidence for the existence of the pentaquark Pc(4380).

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Impact of a nonuniversal Z' on the B → K()l+l- and B → K()ν(ν)over-bar processes

A. V. Bednyakov, A. I. Mukhaeva

Summary: In this study, we investigate the new physics effects in semileptonic flavour changing neutral current processes within an anomaly-free supersymmetric extension of the standard model. The model features a nondiagonal coupling structure between the Z' vector field and fermions, which is parametrized by new physics parameters in addition to the mixing matrices for quarks and leptons in the standard model. We analyze the dependence of observables such as B -> K-(*())nu(nu) rates and CP-odd angular observables in B -> K*ll decays on these parameters, as well as correlations between the predicted observables.

PHYSICAL REVIEW D (2023)

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Article Instruments & Instrumentation

The magnet of the scattering and neutrino detector for the SHiP experiment at CERN

C. Ahdida, R. Albanese, A. Alexandrov, A. Anokhina, S. Aoki, G. Arduini, E. Atkin, N. Azorskiy, J. J. Back, A. Bagulya, F. Baaltasar Dos Santos, A. Baranov, F. Bardou, G. J. Barker, M. Battistin, J. Bauche, A. Bay, V. Bayliss, G. Bencivenni, A. Y. Berdnikov, Y. A. Berdnikov, I. Berezkina, M. Bertani, C. Betancourt, I. Bezshyiko, O. Bezshyyko, D. Bick, S. Bieschke, A. Blanco, J. Boehm, M. Bogomilov, K. Bondarenko, W. M. Bonivento, J. Borburgh, A. Boyarsky, R. Brenner, D. Breton, R. Brundler, M. Bruschi, V. Buescher, A. Buonaura, S. Buontempo, S. Cadeddu, A. Calcaterra, M. Calviani, M. Campanelli, M. Casolino, N. Charitonidis, P. Chau, J. Chauveau, A. Chepurnov, M. Chernyavskiy, K. -Y. Choi, A. Chumakov, P. Ciambrone, L. Congedo, K. Cornelis, M. Cristinziani, A. Crupano, G. M. Dallavalle, A. Datwyler, N. D'Ambrosio, G. D'Appollonio, J. De Carvalho Saraiva, G. De Lellis, M. de Magistris, A. De Roeck, M. De Serio, D. De Simone, L. Dedenko, P. Dergachev, A. Di Crescenzo, C. Dib, H. Dijkstra, P. Dipinto, V. Dmitrenko, S. Dmitrievskiy, L. A. Dougherty, A. Dolmatov, D. Domenici, S. Donskov, V. Drohan, A. Dubreuil, M. Ehlert, T. Enik, A. Etenko, F. Fabbri, L. Fabbri, A. Fabich, O. Fedin, F. Fedotovs, G. Felici, M. Ferro-Luzzi, K. Filippov, R. A. Fini, P. Fonte, C. Franco, M. Fraser, R. Fresa, R. Froeschl, T. Fukuda, G. Galati, J. Gall, L. Gatignon, G. Gavrilov, V. Gentile, S. Gerlach, B. Goddard, L. Golinka-Bezshyyko, A. Golovatiuk, D. Golubkov, A. Golutvin, P. Gorbounov, D. Gorbunov, S. Gorbunov, V. Gorkavenko, Y. Gornushkin, M. Gorshenkov, V. Grachev, A. L. Grandchamp, G. Granich, E. Graverini, J. -L. Grenard, D. Grenier, V. Grichine, N. Gruzinskii, A. M. Guler, Yu. Guz, G. J. Haefeli, C. Hagner, H. Hakobyan, I. W. Harris, E. van Herwijnen, C. Hessler, A. Hollnagel, B. Hosseini, M. Hushchyn, G. Iaselli, A. Iuliano, V. Ivantchenko, R. Jacobsson, D. Jokovic, M. Jonker, I. Kadenko, V. Kain, B. Kaiser, C. Kamiscioglu, K. Kershaw, M. Khabibullin, E. Khalikov, G. Khaustov, G. Khoriauli, A. Khotyantsev, S. H. Kim, Y. G. Kim, V. Kim, N. Kitagawa, J. -W. Ko, K. Kodama, A. Kolesnikov, D. I. Kolev, V. Kolosov, M. Komatsu, N. Kondrateva, A. Kono, N. Konovalova, S. Kormannshaus, I. Korol, I. Korol'ko, A. Korzenev, V. Kostyukhin, E. Koukovini Platia, S. Kovalenko, I. Krasilnikova, Y. Kudenko, E. Kurbatov, P. Kurbatov, V. Kurochka, E. Kuznetsova, H. M. Lacker, M. Lamont, G. Lanfranchi, O. Lantwin, A. Lauria, K. S. Lee, K. Y. Lee, J. -M. Levy, V. P. Loschiavo, L. Lopes, E. Lopez Sola, V. Lyubovitskij, J. Maalmi, A. Magnan, V. Maleev, A. Malinin, Y. Manabe, A. K. Managadze, M. Manfredi, S. Marsh, A. M. Marshall, A. Mefodev, P. Mermod, A. Miano, S. Mikado, Yu. Mikhaylov, D. A. Milstead, O. Mineev, V. Minutolo, A. Montanari, M. C. Montesi, K. Morishima, S. Movchan, Y. Muttoni, N. Naganawa, M. Nakamura, T. Nakano, S. Nasybulin, P. Ninin, A. Nishio, A. Novikov, B. Obinyakov, S. Ogawa, N. Okateva, B. Opitz, J. Osborne, M. Ovchynnikov, N. Owtscharenko, P. H. Owen, P. Pacholek, A. Paoloni, B. D. Park, S. K. Park, G. Passeggio, A. Pastore, M. Patel, D. Pereyma, A. Perillo-Marcone, G. L. Petkov, K. Petridis, A. Petrov, D. Podgrudkov, V. Poliakov, N. Polukhina, J. Prieto, M. Prokudin, A. Prota, A. Quercia, A. Rademakers, A. Rakai, F. Ratnikov, T. Rawlings, F. Redi, S. Ricciardi, M. Rinaldesi, Volodymyr Rodin, Viktor Rodin, P. Robbe, A. B. Rodrigues Cavalcante, T. Roganova, H. Rokujo, G. Rosa, T. Rovelli, O. Ruchayskiy, T. Ruf, V. Samoylenko, V. Samsonov, F. Sanchez Galan, P. Santos Diaz, A. Sanz, A. Saputi, O. Sato, E. S. Savchenko, J. S. Schliwinski, W. Schmidt-Parzefall, N. Serra, S. Sgobba, O. Shadura, A. Shakin, M. Shaposhnikov, P. Shatalov, T. Shchedrina, L. Shchutska, V. Shevchenko, H. Shibuya, L. Shihora, S. Shirobokov, A. Shustov, S. B. Silverstein, S. Simone, R. Simoniello, M. Skorokhvatov, S. Smirnov, J. Y. Sohn, A. Sokolenko, E. Solodko, N. Starkov, L. Stoel, B. Storaci, M. E. Stramaglia, D. Sukhonos, Y. Suzuki, S. Takahashi, J. L. Tastet, P. Teterin, S. Than Naing, I. Timiryasov, V. Tioukov, D. Tommasini, M. Torii, N. Tosi, D. Treille, R. Tsenov, S. Ulin, A. Ustyuzhanin, Z. Uteshev, G. Vankova-Kirilova, F. Vannucci, P. Venkova, V. Venturi, S. Vilchinski, M. Villa, Heinz Vincke, Helmut Vincke, C. Visone, K. Vlasik, A. Volkov, R. Voronkov, S. van Waasen, R. Wanke, P. Wertelaers, J. -K. Woo, M. Wurm, S. Xella, D. Yilmaz, A. U. Yilmazer, C. S. Yoon, P. Zarubin, I. Zarubina, Yu. Zaytsev

JOURNAL OF INSTRUMENTATION (2020)

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Article Physics, Particles & Fields

Electromagnetic properties of the nucleon and the Roper resonance in soft-wall AdS/QCD at finite temperature

Thomas Gutsche, Valery E. Lyubovitskij, Ivan Schmidt

NUCLEAR PHYSICS B (2020)

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Article Physics, Particles & Fields

New ideas for handling of loop and angular integrals in D-dimensions in QCD

Valery E. Lyubovitskij, Fabian Wunder, Alexey S. Zhevlakov

Summary: This paper discusses new methods for considering loop diagrams and angular integrals in D dimensions in QCD, including simplification and expansion of tensorial loop integrals and angular integrals, as well as derivation of recursion relations.

JOURNAL OF HIGH ENERGY PHYSICS (2021)

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Article Astronomy & Astrophysics

The diffractive contribution to deep inelastic lepton-proton scattering: Implications for QCD momentum sum rules and parton distributions

Stanley J. Brodsky, Valery E. Lyubovitskij, Ivan Schmidt

Summary: The deep inelastic lepton-proton scattering includes a diffractive deep inelastic contribution, which accounts for a certain proportion of the events and can be misidentified as contributions from other parts of the proton structure.

PHYSICS LETTERS B (2022)

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Article Astronomy & Astrophysics

Novel corrections to the momentum sum rule for nuclear structure functions

Stanley J. Brodsky, Valery E. Lyubovitskij, Ivan Schmidt

Summary: We address novel features of deep inelastic lepton scattering on nuclei at small Bjorken variable x(Bj). In this regime, the lepton-nuclear cross section involves the interference between the standard lepton-quark scattering amplitude and a two-step process. The phases associated with the t-channel exchanges in the diffractive amplitude can produce interference of the one-step and two-step amplitudes, regulating the amounts of shadowing suppression and anti-shadowing enhancement at low x(Bj).

PHYSICS LETTERS B (2022)

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Article Physics, Particles & Fields

QCD at the amplitude level: Fock state interference in heavy quark electroproduction

Valery E. Lyubovitskij, Ivan Schmidt

Summary: This article discusses the heavy quark electroproduction on protons induced by certain Fock states and the non-perturbative gluon in the proton. These Fock states result in both perturbative and intrinsic heavy quark contributions, which interfere with each other. The nonperturbative light-front wavefunctions of these Fock states are calculated using the color-confining light-front holographic QCD theory. The analysis reveals a novel asymmetry between intrinsic and extrinsic heavy quark content in QCD and provides new insights into heavy quark phenomena at the amplitude level.

JOURNAL OF HIGH ENERGY PHYSICS (2023)

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Correction Physics, Particles & Fields

QCD at the amplitude level: Fock state interference in heavy quark electroproduction (vol 05, 054, 2023)

Valery E. Lyubovitskij, Ivan Schmidt

JOURNAL OF HIGH ENERGY PHYSICS (2023)

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Article Astronomy & Astrophysics

Dark SU(2) Stueckelberg portal

Valery E. Lyubovitskij, Alexey S. Zhevlakov, Aliaksei Kachanovich, Serguei Kuleshov

Summary: We investigate the non-Abelian SU(2)D extension of the U(1)D Stueckelberg portal, which acts as a mediator between the Standard Model (SM) and the dark sector. This portal utilizes the Stueckelberg mechanism to generate masses for the dark gauge bosons. The proposed U(1)D circle times SU(2)D Stueckelberg portal has a connection to SM matter fields, similar to the familon model. We derive constraints on the couplings of dark portal bosons and SM particles, which control diagonal and nondiagonal flavor transitions of quarks and leptons.

PHYSICAL REVIEW D (2023)

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Article Astronomy & Astrophysics

Bulk-to-boundary propagators with arbitrary total angular momentum J in soft-wall AdS/QCD

Valery E. Lyubovitskij, Ivan Schmidt

Summary: This study derives the equations of motion for the bulk-to-boundary propagators of AdS boson and fermion fields in a soft-wall AdS/QCD model and solves them analytically. It focuses on studying transition form factors induced by these propagators for on-shell and off-shell hadrons, building upon previous research on form factors induced by propagators with total angular momentum J = 1.

PHYSICAL REVIEW D (2023)

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Article Astronomy & Astrophysics

Heavy quark contribution to the electromagnetic properties of the nucleon

Stanley J. Brodsky, Valery E. Lyubovitskij, Ivan Schmidt

Summary: This study revisits the physics of intrinsic heavy quarks using light-front holographic QCD and explores their impact on the electromagnetic properties of nucleons.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Predictions for the Sivers single-spin asymmetry from holographic QCD

Valery E. Lyubovitskij, Ivan Schmidt, Stanley J. Brodsky

Summary: Holographic light-front QCD, a new approach to nonperturbative QCD, presents a comprehensive model for hadron dynamics and spectroscopy. It incorporates color confinement, a universal hadron mass scale, the prediction of a massless pion in the chiral limit, and connections between the spectroscopy of mesons, baryons and tetraquarks across the full hadron spectrum. In this article, predictions for the Sivers asymmetry and related transverse momentum distributions for the proton are presented based on the light-front wavefunctions of the baryon eigenstate predicted by holographic QCD.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Meson masses and decay constants in holographic

Valery E. Lyubovitskij, Ivan Schmidt

Summary: This article focuses on the chiral and heavy quark mass expansion of meson masses and decay constants, and proposes a light-front QCD formalism for evaluating these quantities, consistent with chiral perturbation theory and heavy quark effective theory.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Radiative transitions of charmonium states in the covariant confined quark model

Gurjav Ganbold, Thomas Gutsche, Mikhail A. Ivanov, Valery E. Lyubovitskij

Summary: In this study, dominant radiative transitions of charmonium S- and P-wave states were investigated within the covariant confined quark model. Gauge invariant leading-order transition amplitudes were expressed using conventional Lorentz structures or helicity amplitudes, with renormalization couplings of the charmonium states fixed by compositeness conditions. By fitting latest data, an optimal parameter value describing the quark distribution inside hadrons was determined, resulting in estimated results in good agreement with experimental data.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

New findings in gluon TMD physics

Valery E. Lyubovitskij, Ivan Schmidt

Summary: In this study, a model-independent decomposition of the gluon correlator is revisited to produce T-even and T-odd gluon transverse momentum distributions at leading twist. The study proposes an expansion of the gluon correlator using a basis of four tensors, allowing clear interpretations of the transversity T-odd TMDs with linear polarization of gluons. Through a light-front wave function representation, T-even and T-odd gluon TMDs in the nucleon are derived, with the TMDs constructed as a factorized product of two LFWFs and a gluonic matrix. The study also derives new sum rules involving T-even TMDs and makes conjectures about additional sum rules for T-odd gluon TMDs, validating them at different orders of the strong coupling constant.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Gluon parton densities in soft-wall AdS/QCD

Valery E. Lyubovitskij, Ivan Schmidt

Summary: In this study, gluon parton densities and form factors in the soft-wall AdS/QCD model were examined, showing that their power behavior at large values of the light-cone variable and square momentum align with quark counting rules. The transverse momentum distributions derived from this approach also adhere to the model-independent Mulders-Rodrigues inequalities without the need for specific model parameters. All gluon parton distributions are defined in terms of unpolarized and polarized gluon PDFs and profile functions, which are related to gluon PDFs via differential equations.

PHYSICAL REVIEW D (2021)

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