Improved estimates for the parameters of the heavy quark expansion by Johannes Heinonen, Thomas Mannel

“…We give improved estimates for the non-perturbative parameters appearing in the heavy quark expansion for inclusive decays. While the parameters appearing in low orders of this expansion can be extracted from data, the number of parameters in higher orders proliferates strongly, making a determination of these parameters from data impossible. …”
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Tetraquark mass relations in quark and diquark models by Muhammad Naeem Anwar, Timothy J. Burns

“…Additionally, we explore the connections among tetraquark models, and show how those with effective (quark or diquark) masses are related to dynamical potential models. …”
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New physics in single resonant top quarks by Shelley Tong, James Corcoran, Max Fieg, Michael Fenton, Daniel Whiteson

“…Abstract Searches for new physics in the top quark sector are of great theoretical interest, yet some powerful avenues for discovery remain unexplored. …”
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Tetraquarks and Pentaquarks from Quark Model Perspective by Hongxia Huang, Chengrong Deng, Xuejie Liu, Yue Tan, Jialun Ping

Subjects: “…quark model…”
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Hybrid stars with large strange quark cores by Ferreira Márcio, Câmara Pereira Renan, Providência Constança

“…The dependence of several NS properties on the different quark interactions is analyzed. We show that the present constraints from neutron star observations allow for the existence of hybrid stars with large strangeness content and large quark cores.…”
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Oscillating Magnetized Color Superconducting Quark Stars by Marcos Osvaldo Celi, Mauro Mariani, Milva Gabriela Orsaria, Lucas Tonetto

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Electromagnetic Response in an Expanding Quark–Gluon Plasma by Igor A. Shovkovy

Subjects: “…quark–gluon plasma…”
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Heavy Baryon Spectroscopy in the Relativistic Quark Model by Rudolf N. Faustov, Vladimir O. Galkin

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Quark CP-phase and Froggatt–Nielsen mechanism by Chuichiro Hattori, Masahisa Matsuda, Mamoru Matsunaga, Takeo Matsuoka

“…Taking the existing data of three mixing angles, we estimate the quark CP-phase at δ=(75±3)°. This result is in accord with observations.…”
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Proton decay from quark and lepton compositeness by Benoît Assi, Bogdan A. Dobrescu

“…Our estimate of the limit imposed by searches for proton decays is Λpre > 104 TeV1/2 C 8 1 / 4 m Q 1 / 2 $$ {C}_8^{1/4}\ {m}_{\mathcal{Q}}^{1/2} $$ , where C 8 is a rescaled coefficient of an 8-prebaryon operator induced by SU(15) dynamics, and m Q $$ {m}_{\mathcal{Q}} $$ is the mass of a composite vectorlike quark. The latter has a lower limit related to the mass of a composite vectorlike lepton, which in turn is required by LHC searches to be above 1 TeV. …”
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Pseudo and quasi quark PDF in the BFKL approximation by Giovanni Antonio Chirilli

“…Abstract I examine the high-energy behavior of the Ioffe-time distribution for the quark bi-local space-like separated operator using the high-energy operator product expansion. …”
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Diffractive and Photon-Induced Production of Top Quark by Michael Pitt

Subjects: “…top quark…”
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Anisotropic flow and the valence quark skeleton of hadrons by Meijian Li, Wenyang Qian, Bin Wu, Hong Zhang

Subjects: “…Quark-Gluon Plasma…”
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Charge Asymmetry in Top Quark Pair Production by Roman Lysák

Subjects: “…top quark…”
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On the ultimate uncertainty of the top quark pole mass by M. Beneke, P. Marquard, P. Nason, M. Steinhauser

“…We combine the known asymptotic behaviour of the QCD perturbation series expansion, which relates the pole mass of a heavy quark to the MSâ¾ mass, with the exact series coefficients up to the four-loop order to determine the ultimate uncertainty of the top-quark pole mass due to the renormalon divergence. …”
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Top quark pair production beyond NNLO by Muselli, Claudio, Bonvini, Marco, Forte, Stefano, Marzani, Simone, Ridolfi, Giovanni

“…We construct an approximate expression for the total cross section for the production of a heavy quark-antiquark pair in hadronic collisions at next-to-next-to-next-to-leading order (N[superscript 3]LO) in αs. …”
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Tracking down hyper-boosted top quarks by Maltoni, Fabio, Selvaggi, Michele, Larkoski, Andrew

“…By means of a fast detector simulation, we apply it to top quark identification and demonstrate that our method efficiently discriminates hadronically decaying top quarks from light QCD jets up to transverse boosts of 20 TeV. …”
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Jet Topics: Disentangling Quarks and Gluons at Colliders by Metodiev, Eric Mario, Thaler, Jesse

“…We also determine separate quark and gluon rapidity spectra from a mixed Z-plus-jet sample. …”
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Measurement of the Mass Difference between t and [overline t] Quarks by CDF Collaboration, Bauer, Gerry P, Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Makhoul, Khaldoun, Paus, Christoph M. E.

“…We present a direct measurement of the mass difference between t and t̄ quarks using tt̄ candidate events in the lepton+jets channel, collected with the CDFII detector at Fermilab's 1.96 TeV Tevatron pp̄ Collider. …”
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Observation of Higgs Boson Decay to Bottom Quarks by CMS Collaboration, Abercrombie, Daniel Robert, Allen, Brandon Leigh, Azzolini, Virginia, Baty, Austin Alan, Bauer, Gerry P, Bi, Ran, Brandt, Stephanie Akemi, Busza, Wit, Cali, Ivan Amos, D'Alfonso, Mariarosaria, Demiragli, Zeynep, Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Harris, Philip Coleman, Hsu, Dylan George, Hu, Miao, Iiyama, Yutaro, Innocenti, Gian Michele, Klute, Markus, Kovalskyi, Dmytro, Lee, Yen-Jie, Luckey Jr, P David, Maier, Benedikt, Marini, Andrea Carlo, McGinn, Christopher Francis, Mironov, Camelia Maria, Narayanan, Siddharth Madhavan, Niu, Xinmei, Paus, Christoph M. E., Roland, Christof E, Roland, Gunther M, Shi, Zhaozhong, Stephans, George S. F., Sumorok, Konstanty C, Tatar, Kaya, Velicanu, Dragos Alexandru, Wang, Jing, Wang, Ta-Wei, Wyslouch, Boleslaw

“…The observation of the standard model (SM) Higgs boson decay to a pair of bottom quarks is presented. The main contribution to this result is from processes in which Higgs bosons are produced in association with a W or Z boson (VH), and are searched for in final states including 0, 1, or 2 charged leptons and two identified bottom quark jets. …”
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