Article
Astronomy & Astrophysics
Naoki Yamamoto, Ryo Yokokura
Summary: This article investigates the instability of 0-form and higher-form symmetries in the presence of background fields and provides a counting rule to describe the number of unstable NG modes.
Article
Physics, Multidisciplinary
Yuki Minami, Hiroyoshi Nakano, Yoshimasa Hidaka
Summary: In studying an O(N) scalar model under shear flow, it was found that the Nambu-Goldstone mode splits into an infinite number of gapless rainbow modes, each with different group velocities and a fractional dispersion relation omega similar to k(1)(2/3) where k(1) is the wave number along the flow direction. These behaviors are not present in an equilibrium state.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Yoshimasa Hidaka, Yuji Hirono, Ryo Yokokura
Summary: In this study, we discuss the counting of Nambu-Goldstone modes associated with the spontaneous breaking of higher-form global symmetries. Effective field theories of NG modes are developed based on symmetry-breaking patterns, using a generalized coset construction for higher-form symmetries. The formula derived for the number of gapless NG modes involves expectation values of the commutators of conserved charges, possibly of different degrees.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Masaru Hongo, Suro Kim, Toshifumi Noumi, Atsuhisa Ota
Summary: This study develops the effective field theory to describe diffusive Nambu-Goldstone (NG) modes associated with spontaneous internal symmetry breaking in nonequilibrium open systems. The derived effective Lagrangian and matching conditions for low-energy coefficients reveal the diffusive gapless behaviors of the NG modes unique to open systems. Two typical situations in condensed matter physics and high-energy physics are demonstrated, showing the appearance of diffusive type-A or type-B NG modes.
Article
Optics
Rodney E. S. Polkinghorne, Tapio P. Simula
Summary: This study investigates rotating finite-size vortex arrays in Bose-Einstein condensates confined by cylindrically symmetric external potentials, demonstrating the presence of two Nambu-Goldstone zero modes associated with spontaneously broken continuous symmetries. The analytical results were verified through direct numerical diagonalizations of the Bogoliubov-de Gennes equations, and comparisons were made between rotating vortex lattices in superfluids, supersolids, and discrete time crystals.
Article
Physics, Nuclear
K. Raya, Z. -f. Cui, L. Chang, J. M. Morgado, C. D. Roberts, J. Rodriguez-Quintero
Summary: Observable measures provide clear windows into emergent hadron mass and its modulations by Higgs boson interactions, which can be accessed through generalised parton distributions (GPDs). Analysis reveals various properties and predictions, such as stiffness differences between gravitational and electromagnetic form factors, tightness of K pressure profiles compared to pi profiles, and similar fraction of meson mass-squared carried by glue and sea combined as with the valence degrees-of-freedom.
Article
Astronomy & Astrophysics
Wojciech Broniowski, Vanamali Shastry, Enrique Ruiz Arriola
Summary: This paper considers the off-shell effects in the generalized parton distributions (GPDs) of the pion, particularly in the Sullivan process. The lack of crossing symmetry in GPDs leads to the involvement of odd powers of the skewness parameter, resulting in the emergence of new off-shell form factors. Using current-algebra techniques, the authors derive exact relations between the four off-shell gravitational form factors of the pion, similar to the electromagnetic case. The findings of this study place strict constraints on the off-shell GPDs of the pion and emphasize the significance of considering off-shell effects in modelling physical processes.
Article
Physics, Particles & Fields
Shuta Ishigaki, Masataka Matsumoto
Summary: The study investigates the dispersion relation of Nambu-Goldstone modes in a dissipative system using the AdS/CFT correspondence, showing that these modes exhibit linear and diffusive behaviors in a non-equilibrium steady state.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
S. Amoroso, J. Fiaschi, F. Giuli, A. Glazov, F. Hautmann, O. Zenaiev
Summary: This study utilizes measurements of charged lepton pairs in high-energy hadron collisions to improve the theoretical predictions for Higgs boson production cross sections at the LHC, providing a new avenue for constraining the Higgs boson cross section from gluon fusion processes.
Article
Astronomy & Astrophysics
J-L Zhang, K. Raya, L. Chang, Z-F Cui, J. M. Morgado, C. D. Roberts, J. Rodriguez-Quintero
Summary: The structural properties of π and K mesons provide insights into mass generation in the Standard Model and the modulation by the Higgs boson. Novel effects in impact parameter space and mass and pressure profiles are revealed through generalised parton distributions constructed from light-front wave functions and one-dimensional valence distribution functions. Notably, K pressure profiles are spatially more compact than π profiles, reaching near-core pressures similar to those in neutron stars.
Article
Astronomy & Astrophysics
Vanamali Shastry, Wojciech Broniowski, Enrique Ruiz Arriola
Summary: We analyze the generalized quasi, Ioffe-time, and pseudodistributions of the valence quarks in the pion at the quark model scale. We use the framework of the Nambu-Jona-Lasinio model and investigate the basic question of how fast the pion has to move to effectively reach the infinite momentum limit, where the approach can provide the information on the generalized parton distribution functions. With developed analytic expressions, we conclude that to effectively approach the infinite momentum limit in the Ioffe-time distributions for values of the Ioffe-time accessible in lattice QCD, one roughly needs the pion momenta of the order of similar to 3 GeV.
Article
Physics, Nuclear
Changfeng Li, Deeptak Biswas, Nihar Ranjan Sahoo
Summary: The higher-order cumulants of net-proton number, net-charge, and net-strangeness multiplicity distributions are widely studied in heavy-ion collisions to search for the quantum-chromodynamics critical point and extract the chemical freezeout parameters. The event-by-event fluctuations of the net-strangeness multiplicity distributions are crucial in determining the chemical freeze-out parameter in the strangeness sector. The study focuses on the net-K, net-A, and net-(K + A) multiplicity distributions and their different order of cumulants, including resonance decay contributions.
Review
Physics, Nuclear
Craig D. Roberts, David G. Richards, Tanja Horn, Lei Chang
Summary: In the standard model of particle physics, there are two mass generating mechanisms: one related to the Higgs boson which is well understood, and the other embedded in quantum chromodynamics responsible for the emergence of hadronic mass, which remains puzzling. Recent progress has been made using theoretical tools like continuum Schwinger function methods and lattice-regularised QCD to understand these mechanisms better and shed light on Nature's Nambu-Goldstone modes. New experimental facilities are expected to contribute greatly in resolving the puzzles of emergent hadronic mass.
PROGRESS IN PARTICLE AND NUCLEAR PHYSICS
(2021)
Article
Physics, Multidisciplinary
J. M. Morgado Chavez, V. Bertone, F. De Soto, M. Defurne, C. Mezrag, H. Moutarde, J. Rodriguez Quintero, J. Segovia
Summary: In this study, we deeply analyze virtual Compton scattering on pions at a future electron-ion collider, carried out through the Sullivan process. The relevant amplitude is parametrized by generalized parton distributions. By utilizing state-of-the-art models and incorporating effective leading-order scale evolution, we evaluate the amplitude for this process and examine the structure of pions in the context of electron-ion colliders. We estimate the expected event-rates for the Sullivan process, demonstrating that deeply virtual Compton scattering on pions can be measured at forthcoming experimental facilities and highlighting the significant role of gluons in describing pions and modulating the event-rates.
Article
Physics, Nuclear
Navdeep Kaur, Harleen Dahiya
Summary: In this study, the transverse momentum-dependent parton distributions for the pion were investigated using the light-front holographic model. The unpolarized parton distribution function and the Boer-Mulders function were obtained and compared with results from other models. An LO evolution was performed for the unpolarized parton distribution function to provide inputs for predicting future experimental data.
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2021)
Article
Instruments & Instrumentation
X. Li, J. K. Adkins, Y. Akiba, A. Albataineh, M. Amaryan, I. C. Arsene, C. Ayerbe Gayoso, J. Bae, X. Bai, M. D. Baker, M. Bashkanov, R. Bellwied, F. Benmokhtar, V. Berdnikov, J. C. Bernauer, F. Bock, W. Boeglin, M. Borysova, E. Brash, P. Brindza, W. J. Briscoe, M. Brooks, S. Bueltmann, M. H. S. Bukhari, A. Bylinkin, R. Capobianco, W. -C. Chang, Y. Cheon, K. Chen, K. -F. Chen, K. -Y. Cheng, M. Chiu, T. Chujo, Z. Citron, E. Cline, E. Cohen, T. Cormier, Y. Corrales Morales, C. Cotton, J. Crafts, C. Crawford, S. Creekmore, C. Cuevas, J. Cunningham, G. David, C. T. Dean, M. Demarteau, S. Diehl, N. Doshita, R. Dupre, J. M. Durham, R. Dzhygadlo, R. Ehlers, L. El Fassi, A. Emmert, R. Ent, C. Fanelli, R. Fatemi, S. Fegan, M. Finger, Jr. M. Finger, J. Frantz, M. Friedman, I. Friscic, D. Gangadharan, S. Gardner, K. Gates, F. Geurts, R. Gilman, D. Glazier, E. Glimos, Y. Goto, N. Grau, S. V. Greene, A. Q. Guo, L. Guo, S. K. Ha, J. Haggerty, T. Hayward, X. He, O. Hen, D. W. Higinbotham, M. Hoballah, T. Horn, A. Hoghmrtsyan, P. -H J. Hsu, J. Huang, G. Huber, A. Hutson, K. Y. Hwang, C. E. Hyde, M. Inaba, T. Iwata, H. S. Jo, K. Joo, N. Kalantarians, G. Kalicy, K. Kawade, S. J. D. Kay, A. Kim, B. Kim, C. Kim, M. Kim, Y. Kim, Y. Kim, E. Kistenev, V. Klimenko, S. H. Ko, I. Korover, W. Korsch, G. Krintiras, S. Kuhn, C. -M. Kuo, T. Kutz, J. Lajoie, D. Lawrence, S. Lebedev, H. Lee, J. S. H. Lee, S. W. Lee, Y. -J. Lee, W. Li, W. B. Li, X. Li, X. Li, X. Li, Y. T. Liang, S. Lim, C. -H. Lin, D. X. Lin, K. Liu, M. X. Liu, K. Livingston, N. Liyanage, W. J. Llope, C. Loizides, E. Long, R. -S. Lu, Z. Lu, W. Lynch, S. Mantry, D. Marchand, M. Marcisovsky, C. Markert, P. Markowitz, H. Marukyan, P. McGaughey, M. Mihovilovic, R. G. Milner, A. Milov, Y. Miyachi, A. Mkrtchyan, P. Monaghan, R. Montgomery, D. Morrison, A. Movsisyan, H. Mkrtchyan, A. Mkrtchyan, C. Munoz Camacho, M. Murray, K. Nagai, J. Nagle, I. Nakagawa, C. Nattrass, D. Nguyen, S. Niccolai, R. Nouicer, G. Nukazuka, M. Nycz, V. A. Okorokov, S. Oresic, J. D. Osborn, C. O'Shaughnessy, S. Paganis, Z. Papandreou, S. F. Pate, M. Patel, C. Paus, G. Penman, M. G. Perdekamp, D. V. Perepelitsa, H. Periera da Costa, K. Peters, W. Phelps, E. Piasetzky, C. Pinkenburg, I. Prochazka, T. Protzman, M. L. Purschke, J. Putschke, J. R. Pybus, R. Rajput-Ghoshal, J. Rasson, B. Raue, K. F. Read, K. Roed, R. Reed, J. Reinhold, E. L. Renner, J. Richards, C. Riedl, T. Rinn, J. Roche, G. M. Roland, G. Ron, M. Rosati, C. Royon, J. Ryu, S. Salur, N. Santiesteban, R. Santos, M. Sarsour, J. Schambach, A. Schmidt, N. Schmidt, C. Schwarz, J. Schwiening, R. Seidl, A. Sickles, P. Simmerling, S. Sirca, D. Sharma, Z. Shi, T. -A. Shibata, C. -W. Shih, S. Shimizu, U. Shrestha, K. Slifer, K. Smith, D. Sokhan, R. Soltz, W. Sondheim, J. Song, J. Song, I. I. Strakovsky, P. Steinberg, P. Stepanov, J. Stevens, J. Strube, P. Sun, X. Sun, K. Suresh, V. Tadevosyan, W. -C. Tang, S. Tapia Araya, S. Tarafdar, L. Teodorescu, D. Thomas, A. Timmins, L. Tomasek, N. Trotta, R. Trotta, T. S. Tveter, E. Umaka, A. Usman, H. W. van Hecke, C. Van Hulse, J. Velkovska, E. Voutier, P. K. Wang, Q. Wang, Y. Wang, Y. Wang, D. P. Watts, N. Wickramaarachchi, L. Weinstein, M. Williams, C. -P. Wong, L. Wood, M. H. Wood, C. Woody, B. Wyslouch, Z. Xiao, Y. Yamazaki, Y. Yang, Z. Ye, H. D. Yoo, M. Yurov, N. Zachariou, W. A. Zajc, W. Zha, J. -L. Zhang, J. -X. Zhang, Y. Zhang, Y. -X. Zhao, X. Zheng, P. Zhuang
Summary: This paper presents simulation studies of exclusive J/y/ detection using the ECCE detector concept in the proposed EIC program. Preliminary results estimate excellent statistics due to the large cross section of J/y/ photoproduction and superior performance of the ECCE detector concept. The precise measurement of exclusive J/y/ photoproduction at EIC will deepen our understanding of nuclear gluon distributions, near threshold production mechanism, and nucleon mass structure.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2023)
Article
Instruments & Instrumentation
R. Seidl, A. Vladimirov, D. Pitonyak, A. Prokudin, J. K. Adkins, Y. Akiba, A. Albataineh, M. Amaryan, I. C. Arsene, C. Ayerbe Gayoso, J. Bae, X. Bai, M. D. Baker, M. Bashkanov, R. Bellwied, F. Benmokhtar, V. Berdnikov, J. C. Bernauer, F. Bock, W. Boeglin, M. Borysova, E. Brash, P. Brindza, W. J. Briscoe, M. Brooks, S. Bueltmann, M. H. S. Bukhari, A. Bylinkin, R. Capobianco, W. -C. Chang, Y. Cheon, K. Chen, K. -F. Chen, K. -Y. Cheng, M. Chiu, T. Chujo, Z. Citron, E. Cline, E. Cohen, T. Cormier, Y. Corrales Morales, C. Cotton, J. Crafts, C. Crawford, S. Creekmore, C. Cuevas, J. Cunningham, G. David, C. T. Dean, M. Demarteau, S. Diehl, N. Doshita, R. Dupre, J. M. Durham, R. Dzhygadlo, R. Ehlers, L. El Fassi, A. Emmert, R. Ent, C. Fanelli, R. Fatemi, S. Fegan, M. Finger, Jr M. Finger, J. Frantz, M. Friedman, I. Friscic, D. Gangadharan, S. Gardner, K. Gates, F. Geurts, R. Gilman, D. Glazier, E. Glimos, Y. Goto, N. Grau, S. V. Greene, A. Q. Guo, L. Guo, S. K. Ha, J. Haggerty, T. Hayward, X. He, O. Hen, D. W. Higinbotham, M. Hoballah, T. Horn, A. Hoghmrtsyan, P. -H. J. Hsu, J. Huang, G. Huber, A. Hutson, K. Y. Hwang, C. E. Hyde, M. Inaba, T. Iwata, H. S. Jo, K. Joo, N. Kalantarians, G. Kalicy, K. Kawade, S. J. D. Kay, A. Kim, B. Kim, C. Kim, M. Kim, Y. Kim, Y. Kim, E. Kistenev, V. Klimenko, S. H. Ko, I. Korover, W. Korsch, G. Krintiras, S. Kuhn, C. -M. Kuo, T. Kutz, J. Lajoie, D. Lawrence, S. Lebedev, H. Lee, J. S. H. Lee, S. W. Lee, Y. -J. Lee, W. Li, W. B. Li, X. Li, X. Li, X. Li, X. Li, Y. T. Liang, S. Lim, C. -H. Lin, D. X. Lin, K. Liu, M. X. Liu, K. Livingston, N. Liyanage, W. J. Llope, C. Loizides, E. Long, R. -S. Lu, Z. Lu, W. Lynch, S. Mantry, D. Marchand, M. Marcisovsky, C. Markert, P. Markowitz, H. Marukyan, P. McGaughey, M. Mihovilovic, R. G. Milner, A. Milov, Y. Miyachi, A. Mkrtchyan, P. Monaghan, R. Montgomery, D. Morrison, A. Movsisyan, H. Mkrtchyan, A. Mkrtchyan, C. Munoz Camacho, M. Murray, K. Nagai, J. Nagle, I. Nakagawa, C. Nattrass, D. Nguyen, S. Niccolai, R. Nouicer, G. Nukazuka, M. Nycz, V. A. Okorokov, S. Oresic, J. D. Osborn, C. O'Shaughnessy, S. Paganis, Z. Papandreou, S. F. Pate, M. Patel, C. Paus, G. Penman, M. G. Perdekamp, D. V. Perepelitsa, H. Periera da Costa, K. Peters, W. Phelps, E. Piasetzky, C. Pinkenburg, I. Prochazka, T. Protzman, M. L. Purschke, J. Putschke, J. R. Pybus, R. Rajput-Ghoshal, J. Rasson, B. Raue, K. F. Read, K. Roed, R. Reed, J. Reinhold, E. L. Renner, J. Richards, C. Riedl, T. Rinn, J. Roche, G. M. Roland, G. Ron, M. Rosati, C. Royon, J. Ryu, S. Salur, N. Santiesteban, R. Santos, M. Sarsour, J. Schambach, A. Schmidt, N. Schmidt, C. Schwarz, J. Schwiening, A. Sickles, P. Simmerling, S. Sirca, D. Sharma, Z. Shi, T. -A Shibata, C. -W Shih, S. Shimizu, U. Shrestha, K. Slifer, K. Smith, D. Sokhan, R. Soltz, W. Sondheim, J. Song, J. Song, I. I. Strakovsky, P. Steinberg, P. Stepanov, J. Stevens, J. Strube, P. Sun, X. Sun, K. Suresh, V. Tadevosyan, W. -C. Tang, S. Tapia Araya, S. Tarafdar, L. Teodorescu, D. Thomas, A. Timmins, L. Tomasek, N. Trotta, R. Trotta, T. S. Tveter, E. Umaka, A. Usman, H. W. van Hecke, C. Van Hulse, J. Velkovska, E. Voutier, P. K. Wang, Q. Wang, Y. Wang, Y. Wang, D. P. Watts, N. Wickramaarachchi, L. Weinstein, M. Williams, C. -P. Wong, L. Wood, M. H. Wood, C. Woody, B. Wyslouch, Z. Xiao, Y. Yamazaki, Y. Yang, Z. Ye, H. D. Yoo, M. Yurov, N. Zachariou, W. A. Zajc, W. Zha, J. -L. Zhang, J. -X. Zhang, Y. Zhang, Y. -X. Zhao, X. Zheng, P. Zhuang
Summary: Feasibility studies were conducted to confirm that the ECCE detector configuration can achieve the physics goals for Sivers functions, transversity, tensor charges, and Collins fragmentation function.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2023)
Article
Astronomy & Astrophysics
P. G. Ortega, J. Segovia, D. R. Entem, F. Fernandez
Summary: The recently discovered T-cc(+) is evaluated as a DD* molecular structure in the J(P) = 1(+) sector. A coupled-channels calculation in charged basis, considering the (DD)-D-0*(+), D+D*(0) and D*D-0*(+) channels, is done in the framework of a constituent quark model that successfully described other molecular candidates in the charmonium spectrum such as the X(3872). The T-cc(+) is found as a (DD)-D-0*(+) molecule (87%) with a binding energy of 387 keV/c(2) and a width of 81 keV, in agreement with the experimental measurements. The quark content of the state forces the inclusion of exchange diagrams to treat indistinguishable quarks between the D mesons, which are found to be essential to bind the molecule. The (DD0)-D-0 pi(+) line shape, scattering lengths and effective ranges of the molecule are also analyzed, which are found to be in agreement with the LHCb analysis. We search for further partners of the T-cc(+) in other charm and bottom sectors, finding different candidates. In particular, in the charm sector we find a shallow J(P) = 1(+) D+D*(0) molecule (83%), dubbed T'(cc), just 1.8 MeV above the T-cc(+) state. In the bottom sector, we find an isoscalar and an isovector J(P) = 1(+) bottom partners, as BB* molecules lying 21.9 MeV/c(2) (I = 0) and 10.5 MeV/c(2) (I = 1), respectively, below the (BB)-B-0*(+) threshold. (c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Article
Astronomy & Astrophysics
Zhu-Fang Cui, Daniele Binosi, Craig D. Roberts, Sebastian M. Schmidt, D. N. Triantafyllopoulos
Summary: Theory suggests that the t-channel exchange of odderon may generate differences between pp and pp over bar cross-sections. Through robust comparisons using a mathematical approach, we find significant differences between pp and pp over bar elastic differential cross-sections. Combining these results with other experiment-theory comparisons, we obtain a significant signal for the existence of odderon at the (4.0 - 5.2)sigma level.
Article
Astronomy & Astrophysics
Marco Guzzi, T. J. Hobbs, Keping Xie, Joey Huston, Pavel Nadolsky, C. -P Yuan
Summary: The long-standing problem of nonperturbative charm in the proton and its magnitude in high-energy experiments remains unresolved due to the limitations of current nonperturbative QCD theory and hadronic data. In this letter, we present a next-to-next-to-leading order CT analysis, CT18 FC, which highlights the challenges in extracting nonperturbative charm in PDF fits. We also discuss the required theory developments and future data to make progress in this field.
Article
Astronomy & Astrophysics
Huey-Wen Lin
Summary: This study presents the lattice QCD calculation of the x-dependent pion valence-quark generalized parton distribution (GPD) directly at physical pion mass. The results show consistent agreement with past lattice QCD and experimental determinations, and also predict higher GPD moments.
Review
Physics, Multidisciplinary
Huey-Wen Lin
Summary: In recent years, there have been significant advancements in hadron structure through the use of lattice QCD. These advancements include improvements in hadron charges, form factors, and moments by eliminating lattice artifacts with the continuum-physical limit. Moreover, a breakthrough has been made in calculating the Bjorken-x dependence of parton distribution functions (PDFs) using large-momentum effective theory in lattice QCD, leading to direct calculations of Bjorken-x dependent structure.
Correction
Optics
M. T. Yamashita, F. F. Bellotti, T. Frederico, D. Fedorov, A. S. Jensen, N. T. Zinner
Article
Astronomy & Astrophysics
Zanbin Xing, Minghui Ding, Lei Chang
Summary: We present a novel approach to calculate the gravitational form factor of pion using the ladder approximation of the Bethe-Salpeter equation with contact interactions. A key aspect of this approach is the symmetry-preserving treatment of the dressed pi pi amplitude, which reveals the contributions from intrinsic quarks and bound states, the latter being essential for the D-term of pion in the soft-pion limit. The method we propose in this study can be applied to numerous processes of significance in physics.
Article
Physics, Multidisciplinary
Daniel Bazin, Kevin Becker, Francesca Bonaiti, Charlotte Elster, Kevin Fossez, Tobias Frederico, Alex Gnech, Chloe Hebborn, Michael Higgins, Linda Hlophe, Benjamin Kay, Sebastian Konig, Konstantinos Kravvaris, Jesus Lubian, Augusto Macchiavelli, Filomena Nunes, Lucas Platter, Gregory Potel, Xilin Zhang
Summary: It is intriguing that distinct few-body structures can emerge from the complex dynamics of many nucleons in nuclear physics. These halo or cluster states are often observed near the boundaries of nuclear stability and play a crucial role in the experimental program at the Facility for Rare Isotope Beams (FRIB). A combined effort of theory and experiment is essential to analyze experiments involving few-body states and refine theories of nuclear force using new data obtained from these experiments. This paper compiles perspectives from a topical program held at FRIB in August 2022, which brought together theorists and experimentalists working on few-body cluster structures in exotic nuclei and their role in FRIB experiments.
Article
Astronomy & Astrophysics
B. Almeida-Zamora, J. J. Cobos-Martinez, A. Bashir, K. Raya, J. Rodriguez-Quintero, J. Segovia
Summary: Inspired by a recent algebraic model, this study extends the model to the case of vector mesons, providing a description of their internal structure. By calculating the leading-twist light-front wave functions and their connection with parton distribution amplitudes, the wave functions of the mesons are obtained. Some interesting results include the algebraic derivation of transverse light-front wave functions but the need for an intermediate step for longitudinal wave functions, differences observed between light and heavy vector mesons, and the x and p(perpendicular to)^(2) dependence of the wave functions.
Article
Physics, Nuclear
U. Taboada-Nieto, P. G. Ortega, D. R. Entem, F. Fernandez, J. Segovia
Summary: The European Organization for Nuclear Research (CERN) has approved a unique QCD facility that combines an updated version of the CERN SPS external M2 beam line with the COMPASS experiment's universal spectrometer. The facility aims to map out the complete spectrum of excited kaons with unprecedented precision using highly intense and energetic kaon beams. This will have a significant impact on both low-energy QCD phenomenology and high-energy particle processes. The kaon spectrum is computed in this study using a constituent quark model and the results are compared with existing literature for further analysis.
EUROPEAN PHYSICAL JOURNAL A
(2023)
Article
Astronomy & Astrophysics
Zhouyou Fan, Huey-Wen Lin, Matthew Zeilbeck
Summary: In this study, we present the nonperturbatively renormalized nucleon gluon momentum fraction using ensembles with 2 + 1 + 1 flavors of highly improved staggered quarks (HISQ) generated by the MILC Collaboration. The renormalization is done using RI/MOM nonperturbative renormalization and CDER technique. The extrapolation of the gluon momentum fraction to the continuum-physical limit shows consistency with other recent lattice-QCD results at physical pion mass.
Article
Astronomy & Astrophysics
Bilgai Almeida Zamora, Enrique Carreon Martinez, Jorge Segovia, J. J. Cobos-Martinez
Summary: The researchers constructed a contact interaction model for eta and eta' mesons and calculated their static properties and transition form factors. The model provided an excellent description of the static properties, but disagreed with experimental data and perturbative QCD prediction for the transition form factors at high momentum.
Article
Physics, Nuclear
S. Adhikari, F. Afzal, C. S. Akondi, M. Albrecht, M. Amaryan, V. Arroyave, A. Asaturyan, A. Austregesilo, Z. Baldwin, F. Barbosa, J. Barlow, E. Barriga, R. Barsotti, T. D. Beattie, V. V. Berdnikov, T. Black, W. Boeglin, W. J. Briscoe, T. Britton, W. K. Brooks, D. Byer, E. Chudakov, P. L. Cole, O. Cortes, V. Crede, M. M. Dalton, D. Darulis, A. Deur, S. Dobbs, A. Dolgolenko, R. Dotel, M. Dugger, R. Dzhygadlo, D. Ebersole, H. Egiyan, T. Erbora, P. Eugenio, A. Fabrizi, C. Fanelli, S. Fang, S. Fegan, J. Fitches, A. M. Foda, S. Furletov, L. Gan, H. Gao, A. Gardner, A. Gasparian, C. Gleason, K. Goetzen, V. S. Goryachev, B. Grube, J. Guo, L. Guo, T. J. Hague, H. Hakobyan, J. Hernandez, N. D. Hoffman, D. Hornidge, G. Hou, G. M. Huber, P. Hurck, A. Hurley, W. Imoehl, D. G. Ireland, M. M. Ito, I. Jaegle, N. S. Jarvis, T. Jeske, R. T. Jones, V. Kakoyan, G. Kalicy, V. Khachatryan, M. Khatchatryan, C. Kourkoumelis, A. Laduke, I. Larin, D. Lawrence, D. I. Lersch, H. Li, W. B. Li, B. Liu, K. Livingston, G. J. Lolos, L. Lorenti, V. Lyubovitskij, D. Mack, A. Mahmood, P. P. Martel, H. Marukyan, V. Matveev, M. Mccaughan, M. Mccracken, C. A. Meyer, R. Miskimen, R. E. Mitchell, K. Mizutani, V. Neelamana, L. Ng, E. Nissen, S. Oresic, A. I. Ostrovidov, Z. Papandreou, C. Paudel, R. Pedroni, L. Pentchev, K. J. Peters, E. Prather, S. Rakshit, J. Reinhold, A. Remington, B. G. Ritchie, J. Ritman, G. Rodriguez, D. Romanov, K. Saldana, C. Salgado, S. Schadmand, A. M. Schertz, K. Scheuer, A. Schick, A. Schmidt, R. A. Schumacher, J. Schwiening, P. Sharp, X. Shen, M. R. Shepherd, A. Smith, E. S. Smith, D. I. Sober, S. Somov, A. Somov, J. R. Stevens, I. I. Strakovsky, B. Sumner, K. Suresh, V. V. Tarasov, S. Taylor, A. Teymurazyan, A. Thiel, T. Viducic, T. Whitlatch, N. Wickramaarachchi, M. Williams, Y. Wunderlich, B. Yu, J. Zarling, Z. Zhang, Z. Zhao, X. Zhou, J. Zhou, B. Zihlmann
Summary: We report the total and differential cross sections for J/& psi; photoproduction and discuss its role in understanding the J/& psi;-proton interaction and the gluon structure of the proton.