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Du, M.L.; Filin, A.; Baru, V.; Dong, X.K.; Epelbaum, E.; Guo, F.K.; Hanhart, C.; Nefediev, A.; Nieves, J.; Wang, Q. |
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Title |
Role of Left-Hand Cut Contributions on Pole Extractions from Lattice Data: Case Study for Tcc(3875)+ |
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Journal Article |
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Year |
2023 |
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Physical Review Letters |
Abbreviated Journal |
Phys. Rev. Lett. |
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Volume |
131 |
Issue |
13 |
Pages |
131903 - 7pp |
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We discuss recent lattice data for the T_{cc}(3875)^{+} state to stress, for the first time, a potentially strong impact of left-hand cuts from the one-pion exchange on the pole extraction for near-threshold exotic states. In particular, if the left-hand cut is located close to the two-particle threshold, which happens naturally in the DD^{*} system for the pion mass exceeding its physical value, the effective-range expansion is valid only in a very limited energy range up to the cut and as such is of little use to reliably extract the poles. Then, an accurate extraction of the pole locations requires the one-pion exchange to be implemented explicitly into the scattering amplitudes. Our findings are general and potentially relevant for a wide class of hadronic near-threshold states. |
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MEDLINE:37832010 |
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no |
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yes |
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yes |
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IFIC @ pastor @ |
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6060 |
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Albaladejo, M.; Nieves, J.; Ruiz Arriola, E. |
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Title |
Femtoscopic signatures of the lightest S-wave scalar open-charm mesons |
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Journal Article |
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Year |
2023 |
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Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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108 |
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014020 - 7pp |
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We predict femtoscopy correlation functions for S-wave D(s)ϕ pairs of lightest pseudoscalar open-charm mesons and Goldstone bosons from next-to-leading-order unitarized heavy-meson chiral perturbation theory amplitudes. The effect of the two-state structure around 2300 MeV can be clearly seen in the (S,I)=(0,1/2) Dπ, Dη, and Ds¯K correlation functions, while in the scalar-strange (1,0) sector, the D∗s0(2317)± state lying below the DK threshold produces a depletion of the correlation function near threshold. These exotic states owe their existence to the nonperturbative dynamics of Goldstone-boson scattering off D(s). The predicted correlation functions could be experimentally measured and will shed light into the hadron spectrum, confirming that it should be viewed as more than a collection of quark model states. |
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no |
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yes |
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no |
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IFIC @ pastor @ |
Serial |
6089 |
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Montesinos, V.; Albaladejo, M.; Nieves, J.; Tolos, L. |
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Title |
Charge-conjugation asymmetry and molecular content: The Ds0*(2317)± in matter |
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Journal Article |
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2024 |
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Physics Letters B |
Abbreviated Journal |
Phys. Lett. B |
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853 |
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138656 - 10pp |
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We analyze the modifications that a dense nuclear medium induces in the D-s0*(2317)(+/-) and D-s1(2460)(+/-). In the vacuum, we consider them as isoscalar D-(*K-) and (D) over bar (()*())(K) over bar S-wave bound states, which are dynamically generated from effective interactions that lead to different Weinberg compositeness scenarios. Matter effects are incorporated through the two-meson loop functions, taking into account the self energies that the D-(*()), (D) over bar (()*()), K, and (K) over bar develop when embedded in a nuclear medium. Although particle-antiparticle [D-s0,s1(()*())(2317,2460)(+) versus D-s0,s1(()*())(2317,2460)(-)] lineshapes are the same in vacuum, we find extremely different density patterns in matter. This charge-conjugation asymmetry mainly stems from the very different kaon and antikaon interaction with the nucleons of the dense medium. We show that the in-medium lineshapes found for these resonances strongly depend on their D-(*()), K/(D) over bar (()*()), K molecular content, and discuss how this novel feature can be used to better determine/constrain the inner structure of these exotic states. |
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[Montesinos, V.; Albaladejo, M.; Nieves, J.] UV, Inst Fis Corpuscular, Inst Invest Paterna, Ctr Mixto,CSIC, C Catedrat Jose Beltran 2, E-46980 Valencia, Spain, Email: Victor.Montesinos@ific.uv.es; |
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Elsevier |
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English |
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0370-2693 |
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WOS:001218202500001 |
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no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
6137 |
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Nieves, J.; Feijoo, A.; Albaladejo, M.; Du, M.L. |
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Title |
Lowest-lying 1/2- and 3/2- ΛQ resonances: From the strange to the bottom sectors |
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Journal Article |
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2024 |
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Progress in Particle and Nuclear Physics |
Abbreviated Journal |
Prog. Part. Nucl. Phys. |
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137 |
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104118 - 23pp |
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Heavy quark symmetry; Constituent quark-model; Molecule; Charmed; Bottomed |
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We present a detailed study of the lowest-lying 1/2(-) and 3/2(-) Lambda Q resonances both in the heavy 2 2 quark (bottom and charm) and the strange sectors. We have paid special attention to the interplay between the constituent quark-model and chiral baryon-meson degrees of freedom, which are coupled using a unitarized scheme consistent with leading-order heavy quark symmetries. We show that the Lambda(b)(5912) [J(P) = 1/2(-)], Lambda(b)(5920) [J(P) = 3/2(-)] and the Lambda(c)(2625) [J(P) = 3/2-], and the Lambda(1520) [J(P) = 3/2(-)] admitting larger breaking corrections, are heavyquark spin-flavor siblings. They can be seen as dressed quark-model states with Sigma Q(()*()) pi molecular components of the order of 30%. The J(P)=1(-) Lambda(2595) has, however, a higher molecular 2 probability of at least 50%, and even values greater than 70% can be easily accommodated. This is because it is located almost on top of the threshold of the Sigma(c)pi pair, which largely influences its properties. Although the light degrees of freedom in this resonance would be coupled to spin-parity 1(-) as in the Lambda(b)(5912), Lambda(b)(5920) and Lambda(c)(2625), the Lambda(c)(2595) should not be considered as a heavy-quark spin-flavor partner of the former ones. We also show that the Lambda(1405) chiral two-pole pattern does not have analogs in the 1 – charmed and bottomed sectors, because the 2 N D-(*()) and N (B) over bar (()*()) channels do not play for heavy quarks the decisive role that the N (K) over bar does in the strange sector, and the notable influence of the bare quark-model states for the charm and bottom resonances. Finally, we predict the existence of two Lambda(b)(6070) and two Lambda(c)(2765) heavy-quark spin and flavor sibling odd parity states. |
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[Nieves, J.; Feijoo, A.; Albaladejo, M.] Inst Fis Corpuscular, Ctr Mixto, CSIC UV, Valencia, Spain, Email: jmnieves@ific.uv.es; |
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Elsevier |
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0146-6410 |
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WOS:001243410100001 |
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no |
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Is ISI |
yes |
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yes |
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Call Number |
IFIC @ pastor @ |
Serial |
6153 |
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Author |
Hernandez, E.; Nieves, J.; Valverde, M. |
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Title |
Coherent pion production off nuclei at T2K and MiniBooNE energies revisited |
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Journal Article |
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2010 |
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Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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82 |
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7 |
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077303 - 4pp |
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As a result of a new improved fit to old bubble chamber data of the dominant axial C-5(A) nucleon-to-delta form factor, and due to the relevance of this form factor for neutrino induced coherent pion production, we reevaluate our model predictions in [Phys. Rev. D 79, 013002 ( 2009)] for different observables of the latter reaction. Central values for the total cross sections increase by 20%-30%, while differential cross sections do not change their shape appreciably. Furthermore, we also compute the uncertainties on total, differential, and flux-averaged cross sections induced by the errors in the determination of C-5(A). Our new results turn out to be compatible within about 1 sigma with the former ones. Finally, we stress the existing tension between the recent experimental determination of the sigma(CCcoh pi(+))/sigma(NCcoh pi(0)) ratio by the SciBooNE Collaboration and the theoretical predictions. |
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[Hernandez, E.] Univ Salamanca, Dept Fis Fundamental, E-37008 Salamanca, Spain |
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Amer Physical Soc |
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1550-7998 |
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ISI:000282945200003 |
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no |
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Is ISI |
yes |
International Collaboration |
no |
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Call Number |
IFIC @ elepoucu @ |
Serial |
361 |
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