Weyl meson and its implications in collider physics and cosmology

Kashyap, Gopal

doi:10.1103/physrevd.87.016018

Cited by 8 publications

(16 citation statements)

References 44 publications

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“…Eq. 18, along with the slow roll condition leads to the constraint, χ 0 >> M P L (19) We point out that the model contains some small parameters, such as, β 1 and λ 1 , which are not protected by conformal invariance. However these parameters need not be very small.…”

Section: Explicit Conformal Symmetry Breakingmentioning

confidence: 87%

“…We point out that there is currently considerable effort to study the potential implications of conformal invariance in cosmology or high energy physics. Several model being studied are based on local conformal invariance [13][14][15][16][17][18][19][20][21][22]. The implications of global scale invariance has also been investigated [23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

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Relating the cosmological constant and slow-roll to conformal symmetry breaking

Jain

Kashyap

2014

Mod. Phys. Lett. A

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We show that a theory with conformal invariance, which is explicitly broken by small terms, provides a solution to the fine tuning problem of the cosmological constant. In the absence of the symmetry breaking terms, the cosmological constant is zero. Its value in the full theory is controlled by the symmetry breaking terms. The symmetry breaking terms also provide the slow roll conditions, which may be useful in constructing a model of inflation.

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Section: Explicit Conformal Symmetry Breakingmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Relating the cosmological constant and slow-roll to conformal symmetry breaking

Jain

Kashyap

2014

Mod. Phys. Lett. A

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“…Included among SVOCs are phthalate ester plasticizers, which are ubiquitous in the built environment. 7 Biomonitoring data from the National Health and Nutrition Examination Survey (NHANES) show that people in the United States display biomarkers of exposure to multiple phthalates; for example, 5 different phthalate metabolites measured in NHANES were detected in women of child-bearing age at frequencies greater than 96% in multiple years between 1999-2014. 8,9 High molecular weight phthalates are used as plasticizers in food packaging and building materials like vinyl flooring.…”

Section: Introductionmentioning

confidence: 99%

“…10 The archetypal high molecular weight phthalate is diethylhexyl phthalate (DEHP), which is a commonly-used phthalate plasticizer with a high U.S. production volume. The emission 7,[11][12][13][14][15] and toxicology 16 of DEHP have been well-studied, and it has been found in surveys of urine 17 and breastmilk 18 . However, other phthalates having similar uses (and thus exposure pathways) have not been as extensively characterized.…”

Section: Introductionmentioning

confidence: 99%

Estimation of the Emission Characteristics of SVOCs from Household Articles Using Group Contribution Methods

Addington

Phillips

Isaacs

2019

Environ. Sci. Technol.

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The risk to humans from chemicals in consumer products is a function of both hazard and exposure. There is an ongoing effort to quantify chemical exposure due to household articles such as furniture and building materials. Polymers and plastic materials make up a substantial portion of these articles, which may contain chemical additives such as plasticizers. When these additives are not bound to the polymer matrix, they are free to diffuse throughout it and leach or emit from the surface. We have implemented a methodology to predict plasticizer emission from polyvinyl chloride (PVC) products, based on group contribution methods that consider a free volume effect to estimate activity coefficients for chemicals in polymer-solvent solutions. Using the estimated activity coefficients, we calculate steady-state gas phase concentrations for plasticizers in equilibrium with the polymer surface (y 0 ). The method uses only the structure of the chemical and polymer, the weight fraction, and physical-chemical properties, allowing rapid estimation of y 0 at different weight fractions in PVC. Using the predicted y 0 values and weight fraction data gleaned from public databases, we estimate plasticizer exposures associated with 72 PVC-containing articles using a high-throughput model. We also investigate potential exposures associated with plasticizer substitutions in these products.

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“…Before we proceed further, we note that the implications of local conformal invariance have been extensively studied in literature [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60]. The implications of global scale invariance have also been investigated [61][62][63][64][65][66][67][68].…”

Section: Introductionmentioning

confidence: 99%

The fine tuning of the cosmological constant in a conformal model

Jain

Kashyap

Mitra

2015

Int. J. Mod. Phys. A

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Abstract:We consider a conformal model involving two real scalar fields in which the conformal symmetry is broken by a soft mechanism and is not anomalous. One of these scalar fields is representative of the standard model Higgs. The model predicts exactly zero cosmological constant. In the simplest version of the model, some of the couplings need to be fine tuned to very small values. We formulate the problem of fine tuning of these couplings. We argue that the problem arises since we require a soft mechanism to break conformal symmetry. The symmetry breaking is possible only if the scalar fields do not evolve significantly over the time scale of the Universe. We present two solutions to this fine tuning problem. We argue that the problem is solved if the classical value of one of the scalar fields is super-Planckian, i.e. takes a value much larger than the Planck mass. The second solution involves introduction of a strongly coupled hidden sector that we call hypercolor. In this case the conformal invariance is broken dynamically and triggers the breakdown of the electroweak symmetry. We argue that our analysis applies also to the case of the standard model Higgs multiplet.

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Weyl meson and its implications in collider physics and cosmology

Cited by 8 publications

References 44 publications

Relating the cosmological constant and slow-roll to conformal symmetry breaking

Relating the cosmological constant and slow-roll to conformal symmetry breaking

Estimation of the Emission Characteristics of SVOCs from Household Articles Using Group Contribution Methods

The fine tuning of the cosmological constant in a conformal model

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