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pro vyhledávání: '"Lebed, Richard"'
Autor:
Lebed, Richard F., Martinez, Steven R.
$T_{cc}^+$ is an isoscalar 4-quark state with mass lying barely below the $D^{*+} D^0$ threshold, and several times further below the $D^{*0} D^+$ threshold. It allows both di-meson molecular and elementary diquark-antidiquark $(cc)(\bar u \bar d)$ s
Externí odkaz:
http://arxiv.org/abs/2406.08690
Autor:
Lebed, Richard F., Martinez, Steven R.
Using the diabatic formalism, which generalizes the adiabatic approximation in the Born-Oppenheimer formalism, we apply well-known Hamiltonian methods to calculate the effect of open di-meson thresholds that lie well below the mass of elementary $c\b
Externí odkaz:
http://arxiv.org/abs/2404.15186
Autor:
Hüsken, Nils, Lebed, Richard F., Mitchell, Ryan E., Swanson, Eric S., Wang, Ya-Qian, Yuan, Chang-Zheng
A recent report of $e^+ e^- \to D\bar D$ events by the BESIII Collaboration suggests the presence of a structure $R$ at 3900~MeV\@. We argue that this structure, called $G(3900)$ in the past, is not in fact due to a new $c\bar c$ resonance, but rathe
Externí odkaz:
http://arxiv.org/abs/2404.03896
Akademický článek
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Autor:
Lebed, Richard F.
Scores of exotic hadrons, particularly tetraquarks and pentaquarks in the heavy-quark sector, have been observed in the past 20 years, and more continue to be discovered to this day. Unlike mesons and baryons, such exotics are not mandated to exist u
Externí odkaz:
http://arxiv.org/abs/2308.00781
Autor:
Abir, Raktim, Akushevich, Igor, Altinoluk, Tolga, Anderle, Daniele Paolo, Aslan, Fatma P., Bacchetta, Alessandro, Balantekin, Baha, Barata, Joao, Battaglieri, Marco, Bertulani, Carlos A., Beuf, Guillaume, Bissolotti, Chiara, Boer, Daniël, Boglione, M., Boughezal, Radja, Braaten, Eric, Brambilla, Nora, Braun, Vladimir, Byer, Duane, Celiberto, Francesco Giovanni, Chien, Yang-Ting, Cloët, Ian C., Constantinou, Martha, Cosyn, Wim, Courtoy, Aurore, Czajka, Alexander, D'Alesio, Umberto, Bozzi, Giuseppe, Danilkin, Igor, Das, Debasish, de Florian, Daniel, Delgado, Andrea, de Melo, J. P. B. C., Detmold, William, Döring, Michael, Dumitru, Adrian, Echevarria, Miguel G., Edwards, Robert, Eichmann, Gernot, El-Bennich, Bruno, Engelhardt, Michael, Fernandez-Ramirez, Cesar, Fischer, Christian, Fox, Geofrey, Freese, Adam, Gamberg, Leonard, Garzelli, Maria Vittoria, Giacosa, Francesco, da Silveira, Gustavo Gil, Glazier, Derek, Goncalves, Victor P., Grossberndt, Silas, Guo, Feng-Kun, Gupta, Rajan, Hatta, Yoshitaka, Hentschinski, Martin, Blin, Astrid Hiller, Hobbs, Timothy, Ilyichev, Alexander, Jalilian-Marian, Jamal, Ji, Chueng-Ryong, Jia, Shuo, Kang, Zhong-Bo, Karki, Bishnu, Ke, Weiyao, Khachatryan, Vladimir, Kharzeev, Dmitri, Klein, Spencer R., Korepin, Vladimir, Kovchegov, Yuri, Kriesten, Brandon, Kumano, Shunzo, Lai, Wai Kin, Lebed, Richard, Lee, Christopher, Lee, Kyle, Li, Hai Tao, Liao, Jifeng, Lin, Huey-Wen, Liu, Keh-Fei, Liuti, Simonetta, Lorcé, Cédric, Machado, Magno V. T., Mantysaari, Heikki, Mathieu, Vincent, Mathur, Nilmani, Mehtar-Tani, Yacine, Melnitchouk, Wally, Mereghetti, Emanuele, Metz, Andreas, Michel, Johannes K. L., Miller, Gerald, Mkrtchyan, Hamlet, Mukherjee, Asmita, Mukherjee, Swagato, Mulders, Piet, Munier, Stéphane, Murgia, Francesco, Nadolsky, P. M., Negele, John W, Neill, Duff, Nemchik, Jan, Nocera, E., Okorokov, Vitalii, Olness, Fredrick, Pasquini, Barbara, Peng, Chao, Petreczky, Peter, Petriello, Frank, Pilloni, Alessandro, Pire, Bernard, Pisano, Cristian, Pitonyak, Daniel, Praszalowicz, Michal, Prokudin, Alexei, Qiu, Jianwei, Radici, Marco, Raya, Khépani, Ringer, Felix, West, Jennifer Rittenhouse, Rodas, Arkaitz, Rodini, Simone, Rojo, Juan, Salazar, Farid, Santopinto, Elena, Sargsian, Misak, Sato, Nobuo, Schenke, Bjoern, Schindler, Stella, Schnell, Gunar, Schweitzer, Peter, Scimemi, Ignazio, Segovia, Jorge, Semenov-Tian-Shansky, Kirill, Shanahan, Phiala, Shao, Ding-Yu, Sievert, Matt, Signori, Andrea, Singh, Rajeev, Skokov, Vladi, Song, Qin-Tao, Srednyak, Stanislav, Stewart, Iain W., Sufian, Raza Sabbir, Swanson, Eric, Syritsyn, Sergey, Szczepaniak, Adam, Sznajder, Pawel, Tandogan, Asli, Tawabutr, Yossathorn, Tawfik, A., Terry, John, Toll, Tobias, Tomalak, Oleksandr, Twagirayezu, Fidele, Venugopalan, Raju, Vitev, Ivan, Vladimirov, Alexey, Vogelsang, Werner, Vogt, Ramona, Vujanovic, Gojko, Waalewijn, Wouter, Wang, Xiang-Peng, Xiao, Bo-Wen, Xing, Hongxi, Yang, Yi-Bo, Yao, Xiaojun, Yuan, Feng, Zhao, Yong, Zurita, Pia
We outline the physics opportunities provided by the Electron Ion Collider (EIC). These include the study of the parton structure of the nucleon and nuclei, the onset of gluon saturation, the production of jets and heavy flavor, hadron spectroscopy a
Externí odkaz:
http://arxiv.org/abs/2305.14572
Autor:
Lebed, Richard F., Martinez, Steven R.
The diabatic framework generalizes the adiabatic approximation built into the Born-Oppenheimer (BO) formalism, and is devised to rigorously incorporate the mixing of BO-approximation eigenstates with two-particle thresholds. We recently applied this
Externí odkaz:
http://arxiv.org/abs/2305.09146
Autor:
Lebed, Richard F., Martinez, Steven R.
Publikováno v:
Phys. Rev. D 106, 074007 (2022)
We apply the diabatic formalism, an extension of the adiabatic approximation inherent to the Born-Oppenheimer (BO) approach of atomic physics, to the problem of mixing between exotic multiquark hadrons and their nearby di-hadron thresholds. The unper
Externí odkaz:
http://arxiv.org/abs/2207.01101
Autor:
Brambilla, Nora, Chen, Hua-Xing, Esposito, Angelo, Ferretti, Jacopo, Francis, Anthony, Guo, Feng-Kun, Hanhart, Christoph, Hosaka, Atsushi, Jaffe, Robert L., Karliner, Marek, Lebed, Richard, Lewis, Randy, Maiani, Luciano, Mathur, Nilmani, Meißner, Ulf-G., Pilloni, Alessandro, Polosa, Antonio Davide, Prelovsek, Sasa, Richard, Jean-Marc, Riquer, Veronica, Rosina, Mitja, Rosner, Jonathan L., Santopinto, Elena, Swanson, Eric S., Szczepaniak, Adam P., Takeuchi, Sachiko, Takizawa, Makoto, Wilczek, Frank, Yamaguchi, Yasuhiro, Zou, Bing-Song
In recent years there has been a rapidly growing body of experimental evidence for existence of exotic, multiquark hadrons, i.e. mesons which contain additional quarks, beyond the usual quark-antiquark pair and baryons which consist of more than thre
Externí odkaz:
http://arxiv.org/abs/2203.16583
Autor:
Lebed, Richard F.
The 2020 announcement by LHCb of a narrow structure $X(6900)$ in the di-$J/\psi$ spectrum -- a potential $c\bar c c\bar c$ state -- has opened a new era in hadronic spectroscopy. In this talk, we briefly survey theory works preceding this event, exam
Externí odkaz:
http://arxiv.org/abs/2201.01721