K0s and Λ production in quark and gluon jets at LEP [Phys. Lett. B 407 (1997) 389]

Acciarri, M.; Адриани, О.; Aguilar-Benı́tez, M.; Ahlen, S. P.; Alcaraz, J.; Alemanni, G.; Allaby, J.; Aloisio, A.; Alverson, G.; Alviggi, M. G.; Ambrosi, G.; Anderhub, H.; Andreev, V.; Angelescu, T.; Anselmo, F.; Arefiev, A.; Azemoon, T.; Aziz, T.; Bagnaia, P.; Baksay, L.; Ball, R. C.; Banerjee, S.; Banerjee, S.; Banicz, K.; Barczyk, A.; Barillère, R.; Barone, L.; Bartalini, P.; Basçhirotto, A.; Basile, M.; Battiston, R.; Bay, A.; Becattini, F.; Becker, U.; Behner, F.; Berdugo, J.; Berges, P.; Bertucci, B.; Betev, B.L.; Bhattacharya, S.; Biasini, M.; Biland, A.; Bilei, G. M.; Blaising, J. J.; Blyth, S.; Bobbink, G. J.; Böck, R.; Böhm, A.; Boldizsár, L.; Borgia, B.; Boucham, A.; Bourilkov, D.; Bourquin, M.; Boutigny, D.; Braccini, S.; Branson, J. G.; Brigljević, V.; Brock, I.; Buffini, A.; Buijs, A.; Burger, J.; Bürger, W.; Busenitz, J.; Cai, X.; Campanelli, M.; Capell, M.; Romeo, G.; Carlino, G.; Cartacci, A. 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X.; Wynhoff, S.; Xu, J.; Xu, Z.; Yang, Bingfang; Yang, Chubin; Yao, Xiaoxia; Ye, J.B.; Yeh, S. C.; You, J. M.; Zalite, A.; Zalite, Y.; Zemp, P.; Zeng, Y.; Zhang, Z.; Zhang, Z.P.; Zhou, B.; Zhou, Y.; Zhu, G. Y.; Zhu, Rong-Fei; Zichichi, A.; Ziegler, F.

doi:10.1016/s0370-2693(98)00396-7

Cited by 6 publications

(8 citation statements)

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“…Hence for small values of sin 2 (β − α) a light h with mass significantly lower than that of the current SM bound (M φ 0 ≥ 87.6 GeV) [3] is not ruled out. We note that in the MSSM it is possible to put actual limits of M h ≥ 70.7 GeV (all tan β) and M A ≥ 71.0 GeV (tan β ≥ 1) [25]. For the heavier CP-even scalar (H) the presence of a small sin 2 (β − α) would automatically force cos 2 (β − α) → 1, thus enabling it to be produced with almost φ 0 strength rate.…”

Section: Constraints and Branching Ratiosmentioning

confidence: 95%

“…the case of M h or M A ≤ 40 GeV. It is usually assumed that the sum of M A and M h is greater than M Z , since the excluded region in the M A , M h plane has the form M A + M h ≥ 90 → 110 GeV [25]. We note that the searches do not consider the possibility of three-body decays to a lighter Higgs, although if such decays were present with a large BR they would have given a similar 6 fermion signature to those already searched for at LEP (see Section 5.3).…”

Section: A Light H or A At Lep2mentioning

confidence: 99%

“…The case when the h is on-shell is considered in the searches in Ref. [25], and we shall be covering this decay in more detail in Section 5.3.…”

Section: A Light H or A At Lep2mentioning

confidence: 99%

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Three-body decays of Higgs bosons at LEP2 and application to a hidden fermiophobic Higgs

Akeroyd

1999

Nuclear Physics B

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We study the decays of Higgs bosons to a lighter Higgs boson and a virtual gauge boson in the context of the non-supersymmetric Two-Higgs-Doublet-Model (2HDM). We consider the phenomenological impact at LEP2 and find that such decays, when open, may be dominant in regions of parameter space and thus affect current Higgs boson search techniques. Three-body decays would be a way of producing light neutral Higgs bosons which have so far escaped detection at LEP due to suppressed couplings to the Z, and are of particular importance in the 2HDM (Model I) which allows both a light fermiophobic Higgs and a light charged scalar. PACS numbers: 12.60.Fr 1 akeroyd@flamenco.ific.uv.es Tel/Fax 34-96-3864555

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Section: Constraints and Branching Ratiosmentioning

confidence: 95%

Section: A Light H or A At Lep2mentioning

confidence: 99%

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Three-body decays of Higgs bosons at LEP2 and application to a hidden fermiophobic Higgs

Akeroyd

1999

Nuclear Physics B

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“…Indeed, Γ(h → bb) is quite small, which has already prompted suggestions to look for other (e.g. invisible [16,17]) Higgs decay modes for low Higgs masses. At the same time, the Higgs search is the cornerstone of the Tevatron Run II physics program, peaking in sensitivity for a range of Higgs masses just beyond the LEP-II reach.…”

Section: Conventional Higgs Searchesmentioning

confidence: 99%

New Higgs signals from flavor physics in large extra dimensions

Cheng

Matchev

1999

Nuclear Physics B

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In a realistic theory with large extra dimensions and TeV scale gravity, there are often other particles living in the extra dimensions in addition to gravitons. A well motivated candidate is the flavon in a flavor theory which explains the smallness of the fermion masses by the large volume of the extra dimensions. The flavon interactions involve the Higgs field and can therefore give rise to new mechanisms of Higgs boson production. We study these new Higgs signals, including both real flavon emission and virtual flavon exchange. They could provide powerful probes of the string scale which are comparable to the extensively studied graviton production, if the flavons and the graviton feel the same number of extra dimensions. If the flavons only live in a subspace of the extra dimensions, they can yield even stronger bounds and may generate spectacular displaced vertex signals. Our study also applies to a four dimensional flavor theory with light flavons as well as to any theory with bulk scalar fields coupled to the Higgs and fermions.

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“…[8,[28][29][30][31][32]. The single-inclusive e + e − annihilation (SIA) [33,34] is similar to both the pp collision and the SIDIS, and can play a similarly fundamental role in the measurement of the polarized Λ production [35][36][37]. Recently, the Belle Collaboration presented the first observation of a nonzero transverse polarization of Λ production in the inclusive process e + e − → Λ(Λ) + X and e + e − → Λ(Λ) + K ± (π ± ) + X [38].…”

Section: Introductionmentioning

confidence: 99%

Transverse polarization of the Λ hyperon from unpolarized quark fragmentation in the diquark model

2017

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We investigate the spin-dependent (naive) T-odd fragmentation function D ⊥ 1T , which can provide an explanation on the transverse polarization of the Λ 0 hyperon produced in an unpolarized process. We calculate D ⊥ 1T for light flavors in the spectator diquark model, with a Gaussian form factor at the hyperon-quark-diquark vertex. We include in the calculation both the scalar diquark and axial-vector diquark spectators. We determine the values of the model parameters by fitting the unpolarized fragmentation function D Λ 1 to the DSV parametrization for D Λ 1 . In addition, we compute the longitudinal polarization fragmentation function G Λ 1 and compare it with the known parametrization of G Λ 1 . We also estimate the transverse polarizations of Λ production, in both semi-inclusive deep inelastic scattering and single inclusive e + e − annihilation.

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K0s and Λ production in quark and gluon jets at LEP [Phys. Lett. B 407 (1997) 389]

Cited by 6 publications

References 0 publications

Three-body decays of Higgs bosons at LEP2 and application to a hidden fermiophobic Higgs

Three-body decays of Higgs bosons at LEP2 and application to a hidden fermiophobic Higgs

New Higgs signals from flavor physics in large extra dimensions

Transverse polarization of the Λ hyperon from unpolarized quark fragmentation in the diquark model

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