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We compute the decay rate for the process $\eta_c\to p\bar p$ using an effective helicity-flipping proton-antiproton-gluon vertex which incorporates nonperturbative chiral symmetry breaking effects induced by instantons. We fix the strength…

High Energy Physics - Phenomenology · Physics 2009-10-22 Mauro Anselmino , Stefano Forte

Protons and antiprotons at collider energies are a source of high energy Weizsaecker--Williams photons. This opens up a possibility to study at the LHC exclusive photoproduction of heavy vector mesons at energies much larger than possible…

High Energy Physics - Phenomenology · Physics 2014-11-20 A. Cisek , W. Schäfer , A. Szczurek

In the 1970s, an unexpected transverse $\Lambda$ polarization in unpolarized proton-Beryllium collisions was discovered, which initiated extensive studies on spin phenomena in high-energy physics. Over the past five decades, similar…

High Energy Physics - Phenomenology · Physics 2024-06-06 Zhoudunming Tu

We show that the QCD color transparency of higher-twist contributions to inclusive hadroproduction cross sections, where baryons are produced directly in a short-distance subprocess, can explain several remarkable features of high-$p_T$…

High Energy Physics - Phenomenology · Physics 2008-11-26 Stanley J. Brodsky , Anne Sickles

Various unconventional isotope effects have been reported in high-temperature superconducting copper oxides which are beyond the scheme of BCS theory. Their origin is investigated within polaron theory which leads to a renormalization of…

Superconductivity · Physics 2009-11-10 A. Bussmann-Holder , H. Keller

This manuscript presents a method to convert position correlation of photon-pairs into polarization entanglement. This is achieved by individually manipulating the polarization state of photons generated in different parts of a non-linear…

Quantum Physics · Physics 2020-07-15 Chithrabhanu Perumangatt , Alexander Lohrmann , Alexander Ling

Entanglement is a unique quantum mechanical attribute and a fundamental resource of quantum technologies. Entanglement can be achieved in various individual degrees of freedom, nonetheless some systems are able to create simultaneous…

Reversible exchange of photons between a material and an optical cavity can lead to the formation of hybrid light--matter states where material properties such as the work function\cite{Hutchison_AM2013a}, chemical…

Photonuclear reactions are induced by the strong electromagnetic field generated by ultrarelativistic heavy-ion collisions. These processes have been extensively studied in ultraperipheral collisions, where the impact parameter is larger…

Nuclear Experiment · Physics 2024-02-21 Afnan Shatat

Exclusive $\gamma\gamma \to$ hadron pairs are among the most fundamental processes in QCD, providing a detailed examination of Compton scattering in the crossed channel. In the high momentum transfer domain $(s,t, {large},\theta_{cm}$ for…

High Energy Physics - Phenomenology · Physics 2007-05-23 S. J. Brodsky

We discuss the production mechanism of partons via vacuum polarization during the very early, gluon dominated phase of an ultrarelativistic heavy-ion collision in the framework of the background field method of quantum chromodynamics.

High Energy Physics - Phenomenology · Physics 2008-11-26 Dennis D. Dietrich , Gouranga C. Nayak , Walter Greiner

The STAR experiment at the Relativistic Heavy-Ion Collider has performed measurements of high transverse momentum particle production in ultra-relativistic heavy-ion collisions. High-pT hadrons are generated from hard parton scatterings…

Nuclear Experiment · Physics 2007-05-23 A. Mischke

We propose and study the photoproduction of a $\gamma\,\rho$ pair with a large invariant mass and a small transverse momentum of the final nucleon, as a way to access generalized parton distributions. In the kinematics of JLab 12-GeV, we…

High Energy Physics - Phenomenology · Physics 2017-04-05 R. Boussarie , B. Pire , L. Szymanowski , S. Wallon

Interference of a single photon generated from a single quantum dot is observed between two photon polarization modes. Each emitted single photon has two orthogonal polarization modes associated with the solid-state single photon source, in…

Mesoscale and Nanoscale Physics · Physics 2009-09-03 H. Kumano , S. Ekuni , H. Nakajima , M. Jo , H. Sasakura , S. Adachi , S. Muto , I. Suemune

A QCD formula for the polarization in the large-p_T \Lambda hyperon production in the unpolarized nucleon-nucleon collision at large x_F is derived. We focus on the mechanism in which the chiral-odd spin-independent twist-3 quark…

High Energy Physics - Phenomenology · Physics 2009-10-31 Y. Kanazawa , Yuji Koike

Sources of entanglement are an enabling resource in quantum technology, and pushing the limits of generation rate and quality of entanglement is a necessary pre-requisite towards practical applications. Here, we present an ultra-bright…

Within the resolved Pomeron model of hard diffractive scattering, we compute prompt photon production in double-Pomeron-exchange events in proton-proton collisions. Using specific kinematical constraints chosen according to the acceptances…

High Energy Physics - Phenomenology · Physics 2016-05-04 A. K. Kohara , C. Marquet

The J-PARC is a hadron-accelerator facility to provide secondary beams of kaons, pions, neutrinos, muons, and the others together with the primary proton beam for investigating a wide range of science projects. High-energy hadron physics…

High Energy Physics - Phenomenology · Physics 2022-05-10 S. Kumano

Instantons, semi-classical trajectories of quantum tunneling in imaginary time, have long been used to study thermodynamic and transport properties in a myriad of condensed matter and high energy systems. A recent experiment in…

It is demonstrated that the non-instantaneous response of the optically induced coherent polarization tremendously influences the real-space shift of electronic charges in semiconductors. The possibility to coherently control this…

Optics · Physics 2013-06-14 Shekhar Priyadarshi , Klaus Pierz , Mark Bieler