We study a gauge B–L extension of the standard model quarks and leptons with unconventional charges for singlet right-handed neutrinos, extra scalars, such that residual Z3 symmetry remains after spontaneous breaking B–L. discuss phenomenological consequences this scenario, including possibility long-lived self-interacting dark matter Z′ collider signatures.

The neutron lifetime anomaly has been used to motivate the introduction of new physics with hidden-sector particles coupled baryon number, and on which stars provide powerful constraints. Although may eventually prove be mundane origin, we use it as motivation for a broader review ways that number violation, real or apparent, dark sectors can intertwine how star observables, both present future, constrain them.

We investigate how our baryon-loss limits from anomalous binary-pulsar period lengthening can be interpreted microscopically to yield specific constraints on the particle physics of baryon number violation within a neutron star. focus possibility disappearance via dark processes and scenarios in which produced dark-sector particles do not survive influence response star baryon-number-violating effects. flesh out conditions for this may occur, as well other key assumptions. then turn analysis...

Tensions in the measurements of neutron and kaon weak decays, such as lifetime, may speak to existence new particles dynamics not present Standard Model (SM). In scenarios with dark sectors, that couple feebly those SM appear. We offer a focused overview possibilities describe how observations stars, which probe either their structure or dynamics, limit them. realizing these constraints, we highlight assessment particle processes within dense baryonic matter impacts emerging picture—and...

In this analysis we demonstrate the freeze-in realization of a non-abelian vector boson dark matter (DM). We choose to elaborate an existing $SU(2)_N$ extension ($N$ stands for neutral) Standard Model (SM) with additional $U(1)=S^{'}$ global symmetry, which stabilizes ($X,\bar{X}$) as DM through unbroken $S=T_{3N}+S^{'}$ and lightest odd $S$ particle. The reveals that contribution production from decay heavier scalar bidoublet $\zeta_1^{0,\pm} \to \zeta_2^{0,\pm}X$ is important even after...

An $SU(2)_N$ extension ($N$ stands for neutral) of the Standard Model (SM) is proposed with an additional $U(1)=S^{'}$ global symmetry, which stabilizes lightest vector boson ($X,\bar{X}$) as dark matter (DM) through unbroken $S=T_{3N}+S^{'}$. The field content model motivated to address neutrino mass generation, a possible unification $SU(7)$, along spontaneous symmetry breaking resulting in massive gauge bosons. None SM particles are charged under and therefore $X,\bar{X}$ do not have...

If the standard model of quarks and leptons is extended to include three singlet right-handed neutrinos, then resulting fermion structure admits an infinite number anomaly-free solutions with just one simple constraint. Well-known examples satisfying this constraint are B–L, Lμ–Lτ, B–3Lτ, etc. We derive constraint, discuss two new which offer some insights mixing among quark lepton families, together their possible verification at Large Hadron Collider.

If leptons do not couple directly to the one Higgs doublet of standard model particle interactions, they must still so somehow indirectly acquire mass, as proposed recently in several models where it happens loop through dark matter. We analyze important consequences this scenario a specific model, including decay, muon anomalous magnetic moment, $\mu \to e \gamma$, eee$, and sector.

Models of fermion and scalar dark matter abound. Here we consider instead vector matter, from an SU(2)_N extension the standard model. It has a number interesting properties, including possible implementation inverse seesaw mechanism for neutrino mass. The annihilation calculating its relic abundance in this model is not dominated by cross section to standard-model particles, but rather other new particles which are thermal equilibrium with those

We propose an extension of the standard model quarks and leptons to include gauge $B-L$ symmetry with exotic array neutral fermion singlets for anomaly cancellation. With addition suitable scalars also transforming under $U(1)_{B-L}$, this becomes a radiative seesaw neutrino mass possible multipartite dark matter. If leptoquark fermions are added, necessarily $B-L$, diphoton excess at 750 GeV, recently observed Large Hadron Collider, may be explained.

Abstract We investigate the influence of a specific class slow Baryon Number Violation (BNV)—one that induces quasi-equilibrium evolution — on pulsar spin characteristics. This work reveals how BNV can potentially alter observable parameters, including spin-down rates, second derivative frequency, and braking indices pulsars. Moreover, we demonstrate could lead to anomalies in timing, along with wide array indices, both positive negative. In addition, examine possibility spin-up due BNV,...

In the multi-component configurations of dark matter phenomenology, we propose a minimal two-component configuration which is an extension Standard Model with only three new fields; one scalar and fermion interact thermal soup through Higgs portal, mediated by other in such way that stabilities candidates are made simultaneously explicit $Z_2$ symmetry. Against most common freeze-out framework, look for particle signatures freeze-in scenario evaluating relic density detection signals. A...

Two theoretically well-motivated gauge extensions of the standard model are $SU(3)_C \times SU(3)_L SU(3)_R$ and $SU(3)_q SU(3)_l SU(3)_R$, where $SU(3)_q$ is same as $SU(3)_C$ $SU(3)_l$ its color leptonic counterpart. Each three variations, according to how $SU(3)_R$ broken. It shown here for first time that a built-in dark $U(1)_D$ symmetry exists in all six versions, may be broken discrete $Z_2$ parity. The available matter candidates each case include fermions, scalars, well {\it vector...

The alternative $[SU(3)]^4$ model of leptonic color and dark matter is discussed. It unifies at $M_U \sim 10^{14}$ GeV has the low-energy subgroup $SU(3)_q \times SU(2)_l SU(2)_L SU(2)_R U(1)_X$ with $(u,h)_R$ instead $(u,d)_R$ as doublets under $SU(2)_R$. built-in global $U(1)$ symmetry which generalized $B-L$. In analogy to $SU(3)_q$ quark triplets, it $SU(2)_l$ hemion have half-integral charges are confined by gauge bosons (stickons). quarkonia, their vector bound states (hemionia)...

An alternative left-right model of quarks and leptons, where the $SU(2)_R$ lepton doublet $(\nu,l)_R$ is replaced with $(n,l)_R$ so that $n_R$ not Dirac mass partner $\nu_L$, has been known since 1987. Previous versions assumed a global $U(1)_S$ symmetry to allow $n$ be identified as dark-matter fermion. We propose here gauge extension by addition extra fermions render free anomalies, just one singlet scalar break $U(1)_S$. This results in two layers dark matter, hidden behind other.

Exotic Higgs decays are promising channels to discover new physics in the near future. We present a simple model with light scalar that couples Standard Model through charged lepton-flavor violating interaction. This can yield exciting signatures, such as $h \to e^+ \mu^-\mu^-$, currently have no dedicated searches at Large Hadron Collider. discuss this detail, assess sensitivity from flavor constraints, explore current constraints existing multi-lepton searches, and construct search...

Abstract Dark matter (DM) particles captured by the Sun can produce high-energy electrons outside through annihilating into meta-stable mediators. The corresponding cosmic-ray electron signals observed space-based experiments will be time dependent due to orbital motion of detectors. shape this dependence is predictable given information Since CR (with energy E > 100 GeV) fluxes are expected constant in time, non-observation such variation used place upper limits on DM annihilation cross...

The [SU(3)]4 quartification model of Babu, Ma, and Willenbrock (BMW), proposed in 2003, predicts a confining leptonic color SU(2) gauge symmetry, which becomes strong at the keV scale. It also existence three families half-charged leptons (hemions) below TeV These hemions are confined to form bound states not so easy discover Large Hadron Collider (LHC). However, just as J/ψ ϒ appeared sharp resonances e−e+ colliders 20th century, corresponding 'hemionium' expected future collider 21st century.

The Sun is not quite a perfect sphere, and its oblateness, thought to be induced through rotation, has been measured using optical observations of radius. Its gravitational quadrupole moment can then deduced solar models, or helioseismology, it also determined from measurements effects on Mercury's orbit. various assessments do agree, with the most complete precise orbital being in slight excess other determinations. This may speak existence non-luminous disk ring, where we note evidence for...

Rare processes in laboratory and within astrophysical environments can be highly sensitive probes of baryon-number-violating interactions at the TeV scale. We demonstrate power neutron stars to constrain baryon-number violation by considering a minimal extension standard model involving TeV-mass scalar mediator GeV scale Majorana fermion <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>ψ</a:mi></a:math>. find that <c:math...

Rare processes in laboratory and within astrophysical environments can be highly sensitive probes of baryon-number violating interactions at the TeV scale. We demonstrate power neutron stars to constrain baryon number violation by considering a minimal extension standard model involving TeV-mass scalar mediator GeV scale Majorana fermion $\psi$. find that $\Delta B = 2$ mass-loss process binary pulsar systems via $n \to \gamma \psi$ subsequent scattering $\psi n \pi^- K^+$ places stringent...

We study the 2010 specific version of 2002 proposed U(1)X extension supersymmetric standard model, which has no μ term and conserves baryon number lepton separately automatically. consider in detail scalar sector as well extra ZX gauge boson, their interactions with necessary color-triplet particles this behave leptoquarks. show how diphoton excess at 750 GeV, recently observed LHC, may be explained within context. identify a new fermion dark-matter candidate discuss its properties. An...

Tensions in the measurements of neutron and kaon weak decays, such as lifetime, may speak to existence new particles dynamics not present Standard Model (SM). In scenarios with dark sectors, that couple feebly those SM appear. We offer a focused overview possibilities describe how observations stars, which probe either their structure or dynamics, limit them. realizing these constraints, we highlight assessment particle processes within dense baryonic matter impacts emerging picture --...

We investigate the influence of a specific class slow Baryon Number Violation (BNV) -- one that induces quasi-equilibrium evolution on pulsar spin characteristics. This work reveals how BNV can potentially alter observable parameters, including spin-down rates, second derivative frequency, and braking indices pulsars. Moreover, we demonstrate could lead to anomalies in timing, along with wide array indices, both positive negative. In addition, examine possibility spin-up due BNV, which may...