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Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M. R.; Adams, T.; Aguiló, E.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Alverson, G.; Alves, G. A.; Anastasoaie, M.; Ancu, L. S.; Andeen, T.; Anderson, S.; Andrieu, Bernard; Anzelc, M. S.; Arnoud, Y.; Arov, M.; Askew, A.; Åsman, B.; Jesus, A. C.S. Assis; Atramentov, O.; Autermann, C.; Ávila, C.; Ay, C.; Badaud, F.; Baden, A.; Bagby, L.; Baldin, B.; Bandurin, D. V.; Banerjee, P.; Banerjee, S.; Barberis, E.; Bargassa, P.; Baringer, P.; Barnes, C.; Barreto, J.; Bartlett, J. F.; Bassler, U.; Bauer, D.; Beale, S.; Bean, A.; Begalli, M.; Begel, M.; Bélanger-Champagne, C.; Bellantoni, L.; Bellavance, A.; Benitez, J. A.; Beri, S. B.; Bernardi, G.; Bernhard, R.; Berntzon, L.; Bertram, I.; Besançon, M.; Beuselinck, R.; Bezzubov, V. A.; Bhat, P. 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A.; Strandberg, J.; Strandberg, S.; Strang, M.; Strauss, M.; Ströhmer, R.; Strom, D.; Strovink, M.; Stutte, L.; Sumowidagdo, S.; Svoisky, P.; Sznajder, A.; Talby, M.; Tamburello, P.; Taylor, W.; Telford, P.; Temple, J.; Tiller, B.; Titov, M.; Tokmenin, V. V.; Tomoto, M.; Toole, T.; Torchiani, I.; Trefzger, T.; Trincaz-Duvoid, S.; Tsybychev, D.; Tuchming, B.; Tully, C.; Tuts, P. M.; Unalan, R.; Uvarov, L.; Uvarov, S.; Uzunyan, S.; Vachon, B.; Berg, P. J. Van Den; Eijk, B. Van; Kooten, R. Van; Leeuwen, W. M. Van; Varelas, N.; Varnes, E. W.; Vartapetian, A.; Vasilyev, I. A.; Vaupel, M.; Verdier, P.; Vertogradov, L. S.; Verzocchi, M.; Villeneuve-Seguier, F.; Vint, P.; Vlimant, J. R.; Toerne, E. von; Voutilainen, M.; Vreeswijk, M.; Wahl, H. D.; Wang, L.; Wang, M. H. L. S; Warchol, J.; Watts, G.; Wayne, M.; Weber, G.; Weber, M.; Weerts, H.; Wermes, N.; Wetstein, M.; White, A.; Wicke, D.; Wilson, G. W.; Wimpenny, S.; Wobisch, M.; Womersley, J.; Wood, D.; Wyatt, T. R.; Xie, Y.; Yacoob, S.; Yamada, R.; Yan, M.; Yasuda, T.; Yatsunenko, Y. A.; Yip, K.; Yoo, H. D.; Youn, S. W.; Chen, Yu; Yu, J.; Yurkewicz, A.; Zatserklyaniy, A.; Zeitnitz, C.; Zhang, D.; Zhao, T.; Zhou, B.; Zhu, J.; Zieliński, M.; Ziemińska, D.; Ziemiński, A.; Zutshi, V.; Zverev, E. G.

doi:10.1103/physrevlett.98.221801

Cited by 99 publications

(149 citation statements)

References 14 publications

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“…The CKM favored decay Ξ − b → Ξ − J/ψ was first seen by the CDF [57,58] and the D0 collaborations [59] in the chain of decays Ξ − b → Ξ − J/ψ and J/ψ → µ + µ − , Ξ − → Λπ − and Λ → pπ − . These measurements led to a first determination of the mass and the lifetime of the Ξ − b .…”

Section: Numerical Resultsmentioning

confidence: 92%

Nonleptonic two-body decays of single heavy baryons ΛQ , ΞQ , and Ω
Gutsche
¹
,
Ivanov
²
,
Körner
³

et al. 2018
Phys. Rev. D
48
5
22
0
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We have made a survey of heavy-to-heavy and heavy-to-light nonleptonic heavy baryon two-body decays and have identified those decays that proceed solely via W -boson emission, i.e. via the tree graph contribution. Some sample decays areand Λc → pφ. We make use of the covariant confined quark model previously developed by us to calculate the tree graph contributions to these decays. We calculate rates, branching fractions and, for some of these decays, decay asymmetry parameters. We compare our results to experimental findings and the results of other theoretical approaches when they are available. Our main focus is on decays to final states with a lepton pair because of their clean experimental signature. For these decays we discuss two-fold polar angle decay distributions such as in the cascade decay Ω − b → Ω − (→ Ξπ, ΛK − ) + J/ψ(→ ℓ + ℓ − ). Lepton mass effects are always included in our analysis.

show abstract

Section: Numerical Resultsmentioning

confidence: 92%

Nonleptonic two-body decays of single heavy baryons ΛQ , ΞQ , and Ω
Gutsche
¹
,
Ivanov
²
,
Körner
³

et al. 2018
Phys. Rev. D
48
5
22
0
View full text Add to dashboard Cite

show abstract

“…energies of 4.23 and 4.26 GeV [220,244,369,370]. The D0 Collaboration also reported signals for the Z c (3900) ± → J/ψπ ± from the semi-inclusive b-flavored hadron decays [371,372], and found that the Z c (3900) only existed in the data with the J/ψπ + π − constrained in the energy region between 4.2 and 4.3 GeV, suggesting that the observed production happened only through the intermediate process Y (4260) → Z c π. One possible explanation for these experimental facts is that the Z c (3900) production is enhanced by the nearby TSs.…”

Section: Use Of Ts: Enhancing Production Of Hadronic Moleculesmentioning

confidence: 97%

Threshold cusps and triangle singularities in hadronic reactions

Guo

Liu

Sakai

2020

Progress in Particle and Nuclear Physics

268

183

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The spectrum of hadrons is the manifestation of color confinement of quantum chromodynamics. Hadronic resonances correspond to poles of the S-matrix. Since 2003, lots of new hadron resonant structures were discovered in the mass regions from light mesons to hadrons containing a pair of a heavy quark and an antiquark. Many of them are candidates of exotic hadrons, and they are usually observed as peaks in invariant mass distributions. However, the S-matrix also has kinematical singularities due to the on-shellness of intermediate particles for a process, such as two-body thresholds and triangle singularities (TSs), and they can produce peaks as well. On the one hand, such singularities may be misidentified as resonances; on the other hand, they can be used as tools for precision measurements. In this paper, we review the threshold cusps and various triangle singularities in hadronic reactions, paying attention to their manifestations in phenomena related to exotic hadron candidates. * fkguo@itp.ac.cn † xiaohai.liu@tju.edu.cn ‡ shsakai@itp.ac.cn 1 The X(3872) is named χ c1 (3872) according to its quantum numbers I G (J P C ) = 0 + (1 ++ ) by the PDG [10]. Similarly, the vector charmonium-like states Y (4260) and Y (4660) mentioned below are called ψ(4260) and ψ(4660), respectively. This naming scheme does not mean that the PDG assumes them to be normal cc charmonium states. Here we follow the XY Z naming scheme that is still used in most of the relevant publications.2 A conventional explanation of the observed peaks was given in Refs. [26,27].3 region Z c (4430) [30], Z c (3900) [31,32] and Z c (4020) [33], the charged bottomonium-like structures Z b (10610) and Z b (10650) [34], and the pentaquark candidates with hidden charm P c (4312), P c (4440) and P c (4457) [35,36]. Most of these new structures were observed in the heavy-flavor sector. In particular, the heavy quarkonium-like ones are often called XY Z states in the literature due to the undetermined internal structure. On the one hand, these discoveries enlarged the known QCD spectrum to a large extent; on the other hand, they became a nice showcase of the intricate nonperturbative nature of QCD at low energies 3 : most of them fall off the expectations from quark model, which despite being just a model had provided useful guidance in classifying a large amount of hadrons into various multiplets. Therefore, they are regarded as prominent candidates of exotic hadrons. However, how the spectrum of exotic hadrons should be organized and even what types of exotic hadrons can be well defined are still unclear. Partly because of this, the observation of each of these new structures leads to different models such as compact tetraquarks (or pentaquarks), hadronic molecules, hybrid states, hadro-charmonia, and kinematic effects, etc. Nevertheless, a deeper understanding of how the hadron spectrum, in particular that of the excited hadrons above (or at least close to) strong decay thresholds, is organized can shed light on the color confinement problem of QCD. For th...

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“…Thus, there are technifermions whose technipions' decay constant F 2 1 ( F 2 ¼ ð246 GeVÞ 2 [15]. Bound states of these technifermions will have masses well below a TeV-greater than the limit M T * 250 GeV [7,16] and probably less than the 600-700 GeV at which ''low-scale'' TC ceases to make sense. Technifermions in complex TC representations imply a quarkoniumlike spectrum of mesons.…”

mentioning

confidence: 99%

Technicolor Explanation for the CDFWjjExcess

2011

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Search for Techniparticles ine+jetsEvents at D0

Cited by 99 publications

References 14 publications

Nonleptonic two-body decays of single heavy baryons ΛQ , ΞQ , and Ω
Gutsche
¹
,
Ivanov
²
,
Körner
³

et al. 2018
Phys. Rev. D
48
5
22
0
View full text Add to dashboard Cite

Nonleptonic two-body decays of single heavy baryons ΛQ , ΞQ , and Ω
Gutsche
¹
,
Ivanov
²
,
Körner
³

et al. 2018
Phys. Rev. D
48
5
22
0
View full text Add to dashboard Cite

Threshold cusps and triangle singularities in hadronic reactions

Technicolor Explanation for the CDFWjjExcess

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Search for Techniparticles ine+jetsEvents at D0

Cited by 99 publications

References 14 publications

Nonleptonic two-body decays of single heavy baryons ΛQ , ΞQ , and ΩGutsche1, Ivanov2, Körner3 et al. 2018Phys. Rev. D485220View full textAdd to dashboardCite

Nonleptonic two-body decays of single heavy baryons ΛQ , ΞQ , and ΩGutsche1, Ivanov2, Körner3 et al. 2018Phys. Rev. D485220View full textAdd to dashboardCite

Threshold cusps and triangle singularities in hadronic reactions

Technicolor Explanation for the CDFWjjExcess

Contact Info

Product

Resources

About

Nonleptonic two-body decays of single heavy baryons ΛQ , ΞQ , and Ω
Gutsche
¹
,
Ivanov
²
,
Körner
³

et al. 2018
Phys. Rev. D
48
5
22
0
View full text Add to dashboard Cite

Nonleptonic two-body decays of single heavy baryons ΛQ , ΞQ , and Ω
Gutsche
¹
,
Ivanov
²
,
Körner
³

et al. 2018
Phys. Rev. D
48
5
22
0
View full text Add to dashboard Cite