Evidence for a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:msup><mml:mi>π</mml:mi><mml:mo>±</mml:mo></mml:msup></mml:math>State

Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M. R.; Adams, T.; Agnew, J. P.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Askew, A.; Atkins, S.; Augsten, K.; Aushev, V.; Aushev, Y.; Ávila, C.; Badaud, F.; Bagby, L.; Baldin, B.; Bandurin, D. V.; Banerjee, S.; Barberis, E.; Baringer, P.; Bartlett, J. F.; Bassler, U.; Bazterra, V. E.; Bean, A.; Begalli, M.; Bellantoni, L.; Beri, S. B.; Bernardi, G.; Bernhard, R.; Bertram, I.; Besançon, M.; Beuselinck, R.; Bhat, P. C.; Bhatia, S.; Bhatnagar, V.; Blazey, G.; Blessing, S.; Bloom, K.; Boehnlein, A.; Boline, D.; Boos, E.; Borissov, G.; Borysova, M.; Brandt, A.; Brandt, O.; Brochmann, M.; Brock, R.; Bross, A.; Brown, D.; Bu, X. B.; Buehler, M.; Buescher, V.; Bunichev, V.; Burdin, S.; Buszello, C. P.; Camacho-Pérez, E.; Casey, B. C.K.; Castilla‐Valdez, H.; Caughron, S.; Chakrabarti, S.; Chan, K.; Chandra, A.; Chapon, É.; Chen, G.; Cho, S. W.; Choi, S.; Choudhary, B. C.; Cihangir, S.; Claes, D. R.; Clutter, J.; Cooke, M.; Cooper, W. E.; Corcoran, M.; Couderc, F.; Cousinou, M. C.; Cúth, J.; Ćutts, D.; Das, Abhishek; Davies, G.; Jong, Sijbrand J. de; Cruz-Burelo, E. De La; Déliot, F.; Démina, R.; Denisov, D.; Denisov, Serguei; Desai, S.; Deterre, C.; Devaughan, K.; Diehl, H. T.; Diesburg, M.; Ding, P. F.; Dominguez, A.; Drutskoy, A.; Dubey, A.; Dudko, L.; Duperrin, A.; Dutt, S.; Eads, M.; Edmunds, D.; Ellison, J.; Elvira, V. D.; Enari, Y.; Evans, H.; Evdokimov, A.; Евдокимов, В. Н.; Fauré, Alexandre; Liu, Feng; Ferbel, T.; Fiedler, F.; Filthaut, F.; Fisher, W. C.; Fisk, H. E.; Fortner, M.; Fox, H.; Franc, J.; Fuess, S.; Garbincius, P. H.; García-Bellido, A.; García-González, J. A.; Gavrilov, V.; Geng, W.; Gerber, C. E.; Gershtein, Y.; Ginther, G.; Gogota, O.; Golovanov, G.; Grannis, P. D.; Greder, S.; Greenlee, H.; Grenier, G.; Gris, Ph.; Grivaz, J.-F.; Grohsjean, A.; Grünendahl, S.; Grünewald, M.; Guillemin, T.; Gutiérrez, G.; Gutiérrez, P.; Haley, J.; Liu, Han; Harder, K.; Harel, A.; Hauptman, J. M.; Hays, J.; Head, T.; Hebbeker, T.; Hedin, D.; Hegab, H.; Heinson, A. P.; Heintz, U.; Hensel, C.; Cruz, I. Heredia-De La; Herner, K.; Hesketh, G. G.; Hildreth, M.; Hirosky, R.; Hoang, T.; Hobbs, J.; Hoeneisen, B.; Hogan, J. M.; Hohlfeld, M.; Holzbauer, J. L.; Howley, I.; Hubáček, Z.; Hynek, V.; Iashvili, I.; Ilchenko, Y.; Illingworth, R.; Ito, A. S.; Jabeen, S.; Jaffré, M.; Jayasinghe, A.; Jeong, M. S.; Jesik, R.; Jiang, Peng; Johns, K.; Johnson, E.; Johnson, Mark D.; Jonckheere, A.; Jönsson, P.; Joshi, J.; Jung, Andreas Werner; Rozas, A. Juste; Kajfasz, E.; Karmanov, D.; Katsanos, I.; Kaur, M.; Kehoe, R.; Kermiche, S.; Khalatyan, N.; Khanov, A.; Kharchilava, A.; Kharzheev, Y. N.; Kiselevich, I.; Kohli, J. M.; Kozelov, A. V.; Kraus, J.; Kumar, Arun; Kupčo, A.; Kurča, T.; Kuzmin, V. A.; Lammers, S.; Lebrun, P.; Lee, H. S.; Lee, S. W.; Lee, W. M.; Lei, X.; Lellouch, J.; Li, D.; Li, H.; Li, L.; Li, Q. Z.; Lim, Jaehoon; Lincoln, D.; Linnemann, J.; Lipaev, V. V.; Lipton, R.; Liu, H.; Liu, Y.; Lobodenko, A.; Lokajı́ček, M.; de, Rafael; Luna-García, R.; Lyon, A. L.; Maciel, A. K.A.; Madar, R.; Magaña-Villalba, R.; Malik, S.; Malyshev, V. L.; Mansour, J. D.; Martínez-Ortega, J.; McCarthy, R. L.; McGivern, C. L.; Meijer, M. M.; Melnitchouk, A.; Menezes, D.; Mercadante, P. G.; Merkin, M.; Meyer, A.; Meyer, J.; Miconi, F.; Mondal, N. K.; Mulhearn, M.; Nagy, E.; Narain, M.; Nayyar, R.; Neal, H. A.; Negret, J. P.; Neustroev, P.; Nguyen, Huong Thi Thanh; Nunnemann, T.; Orduna, J.; Osman, N.; Pal, A.; Parashar, N.; Parihar, V.; Park, S. K.; Partridge, R.; Parua, N.; Patwa, A.; Penning, B.; Perfilov, M.; Peters, Y.; Petridis, K.; Petrillo, G.; Pétroff, P.; Pleier, M.-A.; Podstavkov, V. M.; Попов, А. В.; Prewitt, M.; Price, D.; Prokopenko, N.; Qian, J.; Quadt, A.; Quinn, B.; Ratoff, P. N.; Razumov, I.; Ripp-Baudot, I.; Rizatdinova, F.; Rominsky, M.; Ross, A.; Royon, C.; Rubinov, P.; Ruchti, R.; Sajot, G.; Sánchez-Hernández, A.; Sanders, M. P.; Santos, A. S.; Savage, G.; Savitskyi, M.; Sawyer, L.; Scanlon, T.; Schamberger, R. D.; Scheglov, Y.; Schellman, H.; Schott, M.; Schwanenberger, C.; Schwienhorst, R.; Sekaric, J.; Severini, H.; Shabalina, E.; Shary, V.; Shaw, S.; Shchukin, A. A.; Šimák, V.; Skubic, P.; Slattery, P.; Snow, G. R.; Snow, J.; Snyder, S.; Söldner-Rembold, S.; Sonnenschein, L.; Soustružnı́k, K.; Stark, J.; Stefaniuk, N.; Stoyanova, D. A.; Strauss, M.; Suter, L.; Svoisky, P.; Titov, M.; Tokmenin, V. V.; Tsai, Y. T.; Tsybychev, D.; Tuchming, B.; Tully, C.; Uvarov, L.; Uvarov, S.; Uzunyan, S.; Kooten, R. Van; Leeuwen, W. M. Van; Varelas, N.; Varnes, E. W.; Vasilyev, I. A.; Verkheev, A. Y.; Vertogradov, L. S.; Verzocchi, M.; Vesterinen, M.; Vilanova, D.; Vokáč, P.; Wahl, H. D.; Wang, M. H. L. S.; Warchol, J.; Watts, G.; Wayne, M.; Weichert, J.; Welty-Rieger, L.; Williams, M.; Wilson, G. W.; Wobisch, M.; Wood, D.; Wyatt, T. R.; Xie, Y.; Yamada, R.; Yang, S.; Yasuda, T.; Yatsunenko, Y. A.; Ye, W.; Ye, Z.; Yin, H.; Yip, K.; Youn, S. W.; Yu, J.; Zennamo, J.; Zhao, T.; Zhou, B.; Zhu, J.; Zieliński, Marcin; Ziemińska, D.; Živković, L.

doi:10.1103/physrevlett.117.022003

Cited by 162 publications

(109 citation statements)

References 17 publications

Supporting

Mentioning

104

Contrasting

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“…Furthermore, closed-flavour hybrids allow for exotic J P C quantum numbers; openflavour hybrids, on the other hand, are not eigenstates of C-parity, and so are characterized by non-exotic J P quantum numbers. However, the recent observation of the fully-openflavour X(5568) containing a heavy (bottom) quark [33,34] may be a precursor to additional open-flavour discoveries that do not have a simple quark-model explanation (e.g.,…”

Section: Introductionmentioning

confidence: 99%

Masses of open-flavour heavy-light hybrids from QCD sum-rules

Ho¹,

Harnett²,

Steele³

2017

J. High Energ. Phys.

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We use QCD Laplace sum-rules to predict masses of open-flavour heavy-light hybrids where one of the hybrid's constituent quarks is a charm or bottom and the other is an up, down, or strange. We compute leading-order, diagonal correlation functions of several hybrid interpolating currents, taking into account QCD condensates up to dimensionsix, and extract hybrid mass predictions for all J P ∈ {0 ± , 1 ± }, as well as explore possible mixing effects with conventional quark-antiquark mesons. Within theoretical uncertainties, our results are consistent with a degeneracy between the heavy-nonstrange and heavystrange hybrids in all J P channels. We find a similar mass hierarchy of 1 + , 1 − , and 0 + states (a 1 + state lighter than essentially degenerate 1 − and 0 + states) in both the charm and bottom sectors, and discuss an interpretation for the 0 − states. If conventional meson mixing is present the effect is an increase in the hybrid mass prediction, and we estimate an upper bound on this effect.

show abstract

Section: Introductionmentioning

confidence: 99%

Masses of open-flavour heavy-light hybrids from QCD sum-rules

Ho¹,

Harnett²,

Steele³

2017

J. High Energ. Phys.

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show abstract

“…We also show the prediction for the Z(4430) width, which underestimates the total width as expected. The red point corresponds to the X(5568) state whose observation has been claimed by D∅ [137]. On the left panel we use the X(4140) width as measured by CMS [138].…”

Section: The Discrete Spectrum Of Diquarkonia In the Continuum Of Frementioning

confidence: 99%

“…This state has been identified as the lightest [cs][cs] tetraquark [143], although this interpretation looks at odds with the other states seen in J/ψ φ (see Section 8. [137]. The ratio of the yield of resonant over background events in the detector acceptance region and p ⊥ > 10 GeV is ρ = (8.6 ± 1.9 ± 1.4)%.…”

Section: Other Statesmentioning

confidence: 99%

Multiquark resonances

2017

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Multiquark resonances are undoubtedly experimentally observed. The number of states and the amount of details on their properties have been growing over the years. It is very recent the discovery of two pentaquarks and the confirmation of four tetraquarks, two of which had not been observed before. We mainly review the theoretical understanding of this sector of particle physics phenomenology and present some considerations attempting a coherent description of the so called X and Z resonances. The prominent problems plaguing theoretical models, like the absence of selection rules limiting the number of states predicted, motivate new directions in model building. Data are reviewed going through all of the observed resonances with particular attention to their common features and the purpose of providing a starting point to further research.

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“…There is a growing set of experimental observations of resonance-like structures with quantum numbers which are forbidden for the quark-antiquark system or situated at masses which cannot be explained by the quark-antiquark model [2,3]. For example, the new observations [4][5][6][7][8][9][10] have challenged the conventional wisdom that mesons are made of quark-antiquark pairs in the low energy region.…”

Section: Introductionmentioning

confidence: 99%

The Role of a ₁ (1260) in π ⁻ p → a ₁ ⁻ (1260) p and π ⁻ p → π ⁻ ρ

Chen¹,

Xie²,

Cao³

2016

Commun. Theor. Phys.

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We report on a theoretical study of the π − p → a − 1 (1260)p and π − p → π − ρ 0 p reactions near threshold within an effective Lagrangian approach. The production process is described by t-channel ρ 0 meson exchange. For the π − p → π − ρ 0 p reaction, the final π − ρ 0 results from the decay of the a1(1260) resonance, which is assumed as a dynamically generated state from the K * K and ρπ coupled channel interactions. We calculate the total cross section of the π − p → a − 1 (1260)p reaction. It is shown that, with the coupling constant of the a1(1260) to ρπ channel obtained from the chiral unitary theory and a cut off parameter Λρ ∼ 1.5 GeV in the form factors, the experimental measurement can be reproduced. Furthermore, the total and differential cross sections of π − p → a − 1 (1260)p → π − ρ 0 p reaction are evaluated, and it is expected that our model calculations can be tested by future experiments. These reactions are important for the study of the a1(1260) resonance and would provide further constraints on the properties of the a1(1260) state.

show abstract

Evidence for aBs0π±State

Cited by 162 publications

References 17 publications

Masses of open-flavour heavy-light hybrids from QCD sum-rules

Masses of open-flavour heavy-light hybrids from QCD sum-rules

Multiquark resonances

The Role of a ₁ (1260) in π ⁻ p → a ₁ ⁻ (1260) p and π ⁻ p → π ⁻ ρ

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Evidence for aBs0π±State

Cited by 162 publications

References 17 publications

Masses of open-flavour heavy-light hybrids from QCD sum-rules

Masses of open-flavour heavy-light hybrids from QCD sum-rules

Multiquark resonances

The Role of a 1 (1260) in π − p → a 1 − (1260) p and π − p → π − ρ

Contact Info

Product

Resources

About

The Role of a ₁ (1260) in π ⁻ p → a ₁ ⁻ (1260) p and π ⁻ p → π ⁻ ρ