Observation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>Z</mml:mi><mml:mi>b</mml:mi></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>10610</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>Z</mml:mi><mml:mi>b</mml:mi></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>10650</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math>Decaying to<mml:math xmlns

Garmash, A.; Abdesselam, A.; Adachi, I.; Aihara, H.; Asner, D. M.; Aushev, T.; Ayad, R.; Aziz, T.; Babu, V.; Badhrees, I.; Bakich, A. M.; Behera, P. K.; Bhardwaj, V.; Bhuyan, B.; Bobrov, A.; Bondar, A.; Bonvicini, G.; Bożek, A.; Bračko, M.; Browder, T. E.; Červenkov, D.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chilikin, K.; Cho, K.; Chobanova, V.; Choi, Y.; Cinabro, D.; Dalseno, J.; Danilov, M.; Dash, N.; Doležal, Z.; Drutskoy, A.; Dutta, D.; Eidelman, S.; Epifanov, D.; Farhat, H.; Fast, J. E.; Ferber, T.; Fulsom, B. G.; Gaur, V.; Gabyshev, N.; Gillard, R.; Goh, Y. M.; Goldenzweig, P.; Golob, B.; Hara, T.; Hayasaka, K.; Hayashii, H.; Iijima, T.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jaeglé, I.; Joffe, D.; Joo, K. K.; Julius, T.; Kang, K. H.; Kato, E.; Kawasaki, T.; Kim, D. Y.; Kim, J. B.; Kim, K. T.; Kim, M. J.; Kim, S. H.; Kim, Y. J.; Kinoshita, K.; Korpar, S.; Križan, P.; Krokovny, P.; Kuhr, T.; Kuzmin, A.; Kwon, Y.-J.; Lange, J. S.; Lee, I. S.; Li, C.; Li, H.; Li, L.; Gioi, L. Li; Libby, J.; Liventsev, D.; Lukin, P.; Masuda, M.; Matvienko, D.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Moll, A.; Mori, Takashi; Mussa, R.; Nakano, E.; Nakao, M.; Nanut, T.; Natkaniec, Z.; Nishida, S.; Olsen, S. L.; Pakhlov, P.; Pakhlova, G.; Pal, B.; Park, H.; Pedlar, T. K.; Pestotnik, R.; Petrič, M.; Piilonen, L. E.; Pulvermacher, C.; Ribežl, E.; Ritter, M.; Rostomyan, A.; Sahoo, H.; Sakai, Y.; Sandilya, S.; Sanuki, T.; Savinov, V.; Schneider, O.; Schnell, G.; Schwanda, C.; Seino, Y.; Semmler, D.; Senyo, K.; Seong, I. S.; Sevior, M. E.; Shebalin, V.; Shen, C. P.; Shibata, T. A.; Shiu, J. G.; Shwartz, B.; Simon, F.; Sohn, Y. S.; Solovieva, E.; Starič, M.; Sumiyoshi, T.; Tamponi, U.; Tanida, K.; Teramoto, Y.; Trabelsi, K.; Uchida, M.; Uehara, S.; Uglov, T.; Uno, S.; Hulse, C. Van; Vanhoefer, P.; Varner, G.; Vorobyev, V.; Wagner, M. N.; Wang, C. H.; Wang, M. Z.; Wang, P.; Watanabe, Y.; Williams, K. M.; Won, E.; Yamamoto, H.; Yamaoka, J.; Yashchenko, S.; Yelton, J.; Yook, Y.; Yuan, C. Z.; Zhang, Z. P.; Zhilich, V.; Zhulanov, V.; Zupanc, A.

doi:10.1103/physrevlett.116.212001

Cited by 86 publications

(90 citation statements)

References 16 publications

(7 reference statements)

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“…This issue may be somewhat similar to the known example of the bottomoniumlike B * B * molecular resonance Z b (10650) , where a straightforward estimate based on one pion exchange gives the rate of the decay Z b (10650) → B * B +c.c. about an order of magnitude larger than the experimental upper limit [15]. The reason for such suppression is not known and the behavior is described in terms of a form factor suppression [16] of the pion exchange or as an effect of a contact term [17] effectively canceling the pion contribution.…”

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confidence: 90%

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Some decay properties of hidden-charm pentaquarks as baryon-meson molecules

Voloshin

2019

Phys. Rev. D

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It is pointed out that the previously suggested interpretation of the hidden-charm pentaquarks P c (4312), P c (4440) and P c (4457) as molecular bound states of Σ cD and Σ cD * baryon-meson pairs gives rise to specific relations for their decays. In particular, the heavy quark spin symmetry predicts ratios of rates of decays of each of the molecules to J/ψp and to η c p as well as of the decays to Λ cD and to Λ cD * . Experimental studies of these relations would thus provide an indicative probe of the molecular structure.The initial experimental evidence [1, 2] for hidden-charm pentaquarks has been recently refined into an observation [3] of three relatively narrow resonances P c (4312), P c (4440) and P c (4457) in the J/ψp system produced in the decays Λ b → J/ψpK. The measured positions of the resonance peaks are just few MeV below the thresholds for hidden-charm baryon-meson channels Σ cD and Σ cD * , and the experimental report [3] strongly suggests an interpretation of the lowest P c (4312) resonance as a shallow bound S wave state of Σ cD with the spinparity J P = 1/2 − and the two higher peaks as similar S wave bound systems of Σ cD * with J P = 1/2 − and J P = 3/2 − . Existence of molecular states with hidden heavy flavor was suggested long ago [4], and similar heavy meson-antimeson systems have been observed both with hidden charm [e.g. X(3872) [5]] and the bottomonium-like Z b (10610) and Z b (10650) [6].(Recent reviews of multiquark hadrons including molecular systems with hidden heavy flavor

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confidence: 90%

“…In this case however the kinematical differences can be somewhat more significant than for the case of Eq. (8), amounting to about 40% suppression of the ratio (15) if P c1 is identified as P c (4440). The absolute rate of the decays of molecular pentaquarks to Λ cD ( * ) is currently quite…”

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confidence: 99%

Some decay properties of hidden-charm pentaquarks as baryon-meson molecules

Voloshin

2019

Phys. Rev. D

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“…It is interesting that Z ± b (10610) and Z ± b (10650) have a larger probability in the decay to open heavy mesons rather than the decay to bottomonia;Z ± b (10610) → BB * and Z ± b (10650) → B * B * are the dominant channels with the fractions about 86 % and 74 %, respectively [203]. For charged state, Z ± b (10610) decay to πΥ(nS) (n = 1, 2, 3) and to πh b (mP ) (n = 1, 2) with the fractions whose values are the same order.…”

Section: Brief Overview In Experimental Statusmentioning

confidence: 99%

Heavy hadronic molecules with pion exchange and quark core couplings: a guide for practitioners

Yamaguchi

Hosaka

Takeuchi

et al. 2020

J. Phys. G: Nucl. Part. Phys.

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We discuss selected and important features of hadronic molecules as one of promising forms of exotic hadrons near thresholds. Using examples of DD * systems such as X(3872) and Z c , emphasis is put on the roles of the one pion exchange interaction between them and their coupling to intrinsic quark states. Thus hadronic molecules emerge as admixtures of the dominant long-range hadron structure and short-range quark structure. For the pion exchange interaction, properties of the tensor force are analyzed in detail. More coupled channels supply more attractions, and heavier constituents suppress kinetic energies, providing more chances to form hadronic molecules of heavy hadrons. Throughout this article, we show details of basic ideas and methods. ‡ More complete references are given in section 4.1 for X(3872) and in section 5.1 for Z c and Z b . arXiv:1908.08790v1 [hep-ph] 23 Aug 2019 § Here D ( * ) stands for either D or D * meson. In this article we do not consider systems containing strange quarks, and therefore the notation q is used for light u, d quarks.

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“…As well as studying the decay amplitudes of exotic states, experiments at e + e − colliders can additionally probe their nature by performing scans across a range of centre-of-mass energies around some known invariant mass. Both Belle and BES III presented such measurements [36,37], shown in Fig. 9, and expressed the need to now begin systematically characterising exotic states in order to understand their nature.…”

Section: Wg5: Physics With Heavy Flavoursmentioning

confidence: 99%

“…WG5: Physics with Heavy Flavours Alex Pearce Figure 9: (Left) Distribution of M miss (π) for the e + e − → B * B * π process [36], illustrating that the dominate component is through a resonant exotic state, e + e − → Z(10650)π. (Right) Cross-section measurements for e + e − → J/ψe + e − made at a range of centre-of-mass energies, demonstrating two resolvable structures, reported to be the Y (4260) and the Y (4360) [37].…”

Section: Pos(dis2017)025mentioning

confidence: 99%