Determination of Energy of n
            n-Singlet Virtual State in 
                $$\varvec{d+{{}^{2}}}\hbox {H}\varvec{\rightarrow p+p+n+n}$$
                
                    
                                    
                        
                            
                                d
                                +
                                
                                    
                                    2

Konobeevski, E. S.; Kasparov, A. A.; Mordovskoy, M. V.; Zuyev, S. V.; Лебедев, В. М.; Spassky, A. V.

doi:10.1007/s00601-017-1272-8

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…Figure 5a shows data on the nn scattering length that were obtained in the present study and in other studies devoted to the nd-and dd-breakup reactions [2][3][4][5][6][7][8][9][10]. In [11], it was assumed that substantial discrepancies between experimental results from different studies may be explained by the effect of threenucleon (3N ) forces, which depend on the velocity at which the nn pair and the charged fragment fly apart.…”

Section: Discussionmentioning

confidence: 79%

“…Among them, the nd-and ddbreakup reactions are used most frequently to determine the nn scattering length. However, the data obtained on the nn scattering length in such reactions at different laboratories {TUNL [2,3], BONN [4,5], TUNL-BONN [6,7], and Institute for Nuclear Research (INR, Russian Academy of Sciences) [8][9][10]} after 1998 differ significantly.…”

Section: Introductionmentioning

confidence: 99%

“…The solid lines represent the approximations of the experimental points by the dependence in (4) at a = −16.1 ± 0.1 fm. The points stand for (diamonds) TUNL data from[2,3], (triangles) BONN data from[4,5], (squares) TUNL-BONN data from[6,7], (open circles) data obtained at INR[8][9][10], and (closed circles) our present data.…”

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confidence: 99%

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Data on the Neutron–Neutron Scattering Length from the nd-Breakup Reaction at En = 8 MeV and En = 11 MeV

et al. 2022

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A kinematically complete experiment devoted to studying the $$nd$$-breakup reaction at energies of 8 and 11 MeV via detecting all three secondary particles was performed. The $${}^{1}S_{0}$$ neutron–neutron ($$nn$$) scattering-length values of $$a_{nn}={-}19.8\pm 0.4$$ and $${-}19.0\pm 0.5$$ fm at, respectively, $$E_{n}=8$$ and $$11$$ MeV were obtained from a comparison of the experimental dependence of the yield of the $$nd$$-breakup reaction on the relative energy of the $$nn$$ pair with the results of a simulation. An analysis of the values obtained for the $$nn$$ scattering length, together with data from other experiments, confirms the hypothesis that three-nucleon forces affect the parameters of $$nn$$ interaction that are extracted from reactions involving few-nucleon systems and gives a new asymptotic $$nn$$ scattering length, $$a_{nn}={-}16.1\pm 0.1$$ fm.

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Section: Discussionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

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Data on the Neutron–Neutron Scattering Length from the nd-Breakup Reaction at En = 8 MeV and En = 11 MeV

et al. 2022

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“…In contrast to the truly bound state which behaves as a real particle, the virtual state is usually called the anti-bound state since its wave function is not localized [109]. But the virtual state can indeed induce observable effects, such as in the nuclear reactions [110,111] and the experimental lineshapes [112,113], etc. One can also find a new method to probe the virtual state pole using improved complex scaling method in Ref.…”

Section: Determining the Lecs And Calculating The Mass Spectramentioning

confidence: 99%

Prevalence of resistance mutations associated with integrase inhibitors in therapy-naive HIV-positive patients in Baoding, Hebei province, China

et al. 2022

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Antiretroviral therapy (ART) regimens containing integrase strand transfer inhibitors (INSTIs) are the recommended treatment for human immunodeficiency virus type 1 (HIV-1)-infected patients in the most recent guidelines in China. In this study, we investigated INSTI resistance mutations in newly diagnosed therapy-naive HIV-positive patients in Baoding City, Hebei Province (China) to provide guidance for implementing routine INSTI-associated HIV-1 genotypic resistance testing. Plasma samples were collected from HIV-1-infected patients without treatment at Baoding People’s Hospital from January 2020 to December 2021. The part of HIV-1 pol gene encoding integrase was amplified, sequenced, and analyzed for INSTI resistance. Clinical data including demographic data, CD4+ T cell counts, HIV-RNA loads, and resistance mutations were collected. Treatment-naïve HIV-1 patients (n = 131) were enrolled. We identified ten genotypes, and the predominant genotype was CRF01_AE in 67 patients (51.15%), CRF07_ BC in 39 patients (29.77%), subtype B in 11 patients (8.40%), and other subtypes (CRF68_01B, 3.82%; CRF55_01B, 1.53%, CRF80_0107, 1.53%; URFs 1.53%; and CRF103_01B, CRF59_01B, and CRF65_cpx, 1.4% each). Four major (E138A, R263k, G140S, and S147G) and three accessory (H51Y, Q146QL, and S153F) INSTI-resistance mutations were observed (genotype CRF01_AE, three patients; genotype B, one patient; and genotype CRF07_BC, one patient), resulting in different degrees of resistance to the following five INSTIs: raltegravir, elvitegravir, dolutegravir, bictegravir, and cabotegravir. The overall resistance rate was 3.82% (5/131). All INSTI-resistant strains were cross-resistant. The primary INSTI drug resistance rate among newly diagnosed HIV-infected patients in Baoding was low, but monitoring and research on HIV INSTI resistance should be strengthened in Baoding because INSTI-based regimen prescriptions are anticipated to increase in the near future.

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Spectrum of the molecular tetraquarks: Unraveling the Tcs0(2900) and T<

Wang,

Chen,

Meng

et al. 2024

Phys. Rev. D

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We relate the interactions of the D¯(*)K* and D(*)K* systems to those of D(*)D(*) and D(*)D¯(*) respectively, considering the residual strong interactions at the near-threshold energy is too weak to excite the strange quarks inside the hadrons. We propose an effective model to describe the low-energy S-wave interactions that are undertaken by the light u, d quarks between two separated heavy hadrons. We find that the existence of molecules in the heavy-(anti)heavy sectors will naturally lead to the emergence of molecular states in D¯(*)K* and D(*)K* systems. The recently observed Tcs0(2900) and Tcs¯0a(2900) can be well identified as the 0(0+) and 1(0+) partners of Tcc(3875) and Zc(3900) in the charmed strange sector, respectively. We also predict their members under the (c and s) quark symmetry and SU(2) flavor symmetry. Most of them are very good molecule candidates, for example, (i) the 0(1+) states in D*D*, D¯K*, D¯*K*; (ii) the 0(+)(2+(+)) states in D*D¯*, D¯*K*, D*K*; (iii) the 1−(0++) state in D*D¯* and 1(1+) state in D*K*. The 0+(0++) state in DD¯ and the 0(1+) state in DK* might also exist as virtual states, and the 0(1+) DK* can serve as a key to infer the existence of 0+(0++) DD¯. The Dsπ invariant mass spectrum of Tcs¯0a(2900) is also studied within the coupled-channel approach, and the molecular interpretation of Tcs¯0a(2900) is consistent with the experimental data. Searching for the predicted states in experiments is crucial to discriminate the different pictures for interpreting these near-threshold exotica. Published by the American Physical Society 2024

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Determination of Energy of n n-Singlet Virtual State in $$\varvec{d+{{}^{2}}}\hbox {H}\varvec{\rightarrow p+p+n+n}$$ d + 2

Cited by 6 publications

References 10 publications

Data on the Neutron–Neutron Scattering Length from the nd-Breakup Reaction at En = 8 MeV and En = 11 MeV

Data on the Neutron–Neutron Scattering Length from the nd-Breakup Reaction at En = 8 MeV and En = 11 MeV

Prevalence of resistance mutations associated with integrase inhibitors in therapy-naive HIV-positive patients in Baoding, Hebei province, China

Spectrum of the molecular tetraquarks: Unraveling the Tcs0(2900) and T<

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