{"product_id":"sakhara-baryon-asymmetry-physics-t-shirt","title":"Sakhara – Baryon Asymmetry Physics T-Shirt","description":"\u003cp\u003eSakhara weighs matter against antimatter. The pans almost balance. Almost: that tiny tilt is why there is something.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eThe observable universe holds matter but almost no antimatter, and that excess needs explaining. It is measured by the ratio of baryons to photons, about 6 baryons for every 10 billion photons of the cosmic microwave background. Any mechanism must violate baryon number, violate C and CP symmetry, and act out of thermal equilibrium.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eη = n_B \/ n_γ = (6.104 ± 0.058) × 10⁻¹⁰\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eη: baryon-to-photon ratio (dimensionless)\u003c\/li\u003e\n\u003cli\u003en_B: number density of baryons (m⁻³)\u003c\/li\u003e\n\u003cli\u003en_γ: number density of CMB photons (m⁻³)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAndrei Sakharov set out the three conditions in 1967; the value of η comes from Planck CMB data (Fields et al. 2020).\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e The Standard Model seems to fall far short. The origin of the asymmetry is unknown.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Sakhara, the pixel-art character, with the title. Back: η, Sakharov's three conditions, the Standard Model shortfall and two sources. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936601182311,"sku":"87743040782376273749","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936601215079,"sku":"33276541006235507078","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936601247847,"sku":"14108603741724522507","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936601280615,"sku":"26694429764421471577","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936601313383,"sku":"14481099299412836644","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936601346151,"sku":"15377893935233735787","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936601378919,"sku":"52549025246940125790","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936601411687,"sku":"16741292239146348775","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936601444455,"sku":"20343017396103667973","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936601477223,"sku":"26765721483708494616","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936601509991,"sku":"27207508069951142452","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936601542759,"sku":"31176011810204799510","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936601575527,"sku":"31807610292515343115","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936601608295,"sku":"27320815189339038686","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936601641063,"sku":"26558135735393112284","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936601673831,"sku":"29581825539113889242","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/baryon-asymmetry_front_01_white.png?v=1793595632","url":"https:\/\/pixelatedphysics.com\/tr\/products\/sakhara-baryon-asymmetry-physics-t-shirt","provider":"Pixelated Physics","version":"1.0","type":"link"}